Credential Stuffing

Among all cyberattack strategies, credential stuffing is one of the most common and successful ones. It is because it functions so well that some users log into numerous systems using the same username and password. Let’s explore the details.
Credential Stuffing
Credential Stuffing
Credential stuffing is a cyberattack where hackers use stolen usernames and passwords from any particular website to get unauthorized access to other platforms. Here's everything you need to know.
In this article

Credential Stuffing is an automated cyberattack that involves entering stolen usernames and passwords into the system’s login fields to accomplish an account takeover (ATO) for fraudulent abuse.

Among all cyberattack strategies, credential stuffing is one of the most common and successful ones. It is because it functions so well that some users log into numerous systems using the same username and password. Credential stuffing is a quick attempt by an unauthorized user to get into other systems that might be using the same user information when they have the correct login and password for a person. Cybercrime estimates place this attack method’s success rate between 0.1% and 4%.

Protect your money in times of uncertainty. Get emergency help with the Beem app. Furthermore, Beem’s authentication with multiple factors for access provides an extra layer of protection, considerably lowering the danger of credential abuse.

What is Credential Stuffing?

Credential stuffing is a cyberattack where hackers use stolen usernames and passwords from any particular website to get unauthorized access to other platforms. Bad actors use automated bots to rapidly input these credentials, exploiting the tendency of users to reuse passwords across multiple platforms.

A Brief History of Credential Stuffing

In the ever-evolving cybersecurity landscape, an infamous phenomenon known as credential stuffing emerged as a formidable adversary. The saga unfolded in the shadows of login screens, where a digital burglar armed not with complex codes but with stolen keys relentlessly probed the doors of online accounts.

The tale began with the proliferation of massive data breaches, each breach acting as a treasure trove of usernames and passwords. As these pilfered credentials circulated the internet’s dark corners, they became the currency of a clandestine marketplace. Cybercriminals, akin to modern-day pirates, traded and purchased these stolen keys to our digital kingdoms.

Armed with these ill-gotten credentials, cyber buccaneers embarked on a silent invasion. Unlike traditional hacking, credential stuffing relied on the path of least resistance. Rather than breaching fortified walls, cyber invaders exploited the human tendency to use passwords across different platforms.

The attackers unleashed automated scripts armed with these stolen keys, systematically bombarding login pages across various websites. They were the ghosts in the machine, silently probing for weak points in the digital fortress. The targeted accounts, often belonging to unsuspecting users who reused passwords, became the collateral damage in this virtual siege.

As the digital skirmish intensified, cybersecurity experts raced to fortify defenses. Advanced authentication measures, behavioral analysis, and adaptive security protocols were deployed to repel the invaders. Yet, the war waged on, a perpetual dance between security and fraud.

In this retrospective saga, users were the ultimate guardians of their digital realms. Vigilance, password hygiene, and adopting multifactor authentication became the shields that repelled the invaders. As the pages of this narrative continued to turn, the battle against credential stuffing remained a pivotal chapter in the evolving chronicles of cybersecurity.

How Credential Stuffing Works

Credential stuffing dances to a deceptively simple yet highly effective tune in the covert realm of cyber warfare. Let’s step into the shadowy underworld where cyber assailants orchestrate this symphony of intrusion.

The Pilfered Prelude

The overture begins with attackers obtaining stolen or purchased credentials from the dark web. These digital keys, often the spoils of a grand data breach or cyber heist, come with a surprisingly modest price tag.

A Bot Ballet

Armed with credentials for at least one online account, the adversary takes center stage, choreographing a botnet or automation tool. This digital troupe is set in motion to perform a synchronized login routine across multiple unrelated accounts. The bot, shrouded in a cloak that obscures its IP address, pirouettes past security tools that may otherwise block foreign or suspicious addresses.

Harvesting the Crescendo

As the bot executes its routine, it assesses the aftermath of its login attempts. If the digital dance is successful, the actor embarks on a grand gathering of additional information. Personal data, stored credit card details, or bank information become the coveted notes of this cyber symphony. But the performance doesn’t end there; fraudsters may engage in a myriad of scams and crimes:

  • Selling access to compromised subscription accounts on the dark web, spanning streaming services, media outlets, gaming platforms, and more.
  • Executing transactions for goods or services using pilfered payment methods.
  • Conducting a grand account takeover, where the adversary assumes control, tweaking security settings, contact information, and other details to facilitate future nefarious activities.
  • Trading personal information gleaned from customer accounts to fuel phishing campaigns and support more sophisticated cyber assaults.

Corporate Infiltration Sonata

If hackers breach the fortress of a corporate network through a compromised account – be it of an employee, contractor, or vendor – the music takes a darker turn. Within the symphony of intrusion, the infiltrator has time to move laterally, installing secret passages, acquiring insights about the system for future attacks, and stealing data. Cloaked in legitimate account credentials, they masquerade as a legitimate user, rendering traditional security measures powerless in detecting their covert activities.

As the cyber symphony of credential stuffing continues to evolve, businesses and individuals must remain vigilant, fortifying their defenses against this digital ballet’s subtle yet potent movements.

Why is Credential Stuffing Rising Day by Day?

In the ever-expanding digital universe, a subtle yet formidable force has gained momentum – the relentless surge of credential stuffing. This intricate cyber threat has quietly become a pervasive challenge, leaving organizations to grapple with an unprecedented uptick. But what fuels this surge, and why is credential stuffing swiftly becoming the weapon of choice for cyber malefactors?

Consumer Habits Unleashed

The ubiquity of online services has birthed a digital lifestyle where users seamlessly navigate myriad platforms daily. In this digital sprawl, individuals often succumb to the ease of password reuse across multiple accounts. Unbeknownst to them, this habitual convenience transforms into a goldmine for cybercriminals. Armed with stolen credentials from one platform, attackers systematically test the same combinations across various services, exploiting the widespread practice of password recycling.

Data Breaches on an Unprecedented Scale

The digital landscape has seen a shocking surge in massive data breaches, wherein millions of user credentials are bare. These treasure troves of sensitive information promptly surface on the dark web, endowing cyber miscreants with an arsenal for launching credential-stuffing assaults. The sheer volume and diversity of purloined credentials exponentially amplify the scale and efficacy of these infiltrations.

Democratization of Cybercrime

In the age of accessibility, automated tools have democratized cybercrime. Thanks to these user-friendly tools, even neophyte hackers can orchestrate large-scale credential-stuffing attacks with minimal effort. The lowered barrier to entry significantly contributes to the widespread adoption of credential-stuffing techniques.

Monetary Temptations

Lurking in the shadows of the digital underworld, cybercriminals are enticed by financial gains. Credential stuffing, with its potential to grant unauthorized access to user accounts, becomes a conduit for various nefarious activities – from fraudulent transactions to identity theft. Monetary incentives make credential stuffing an attractive avenue for those seeking illicit profits.

In essence, the surge of credential stuffing is a symphony of user habits, rampant data breaches, the democratization of cybercrime, and the irresistible allure of financial gains. For organizations navigating this intricate landscape, unraveling the motivations behind credential stuffing is paramount for shoring up defenses against this silent but formidable adversary in cybersecurity.

Costs of Credential Stuffing Attacks

In the intricate dance of cyber threats, credential-stuffing attacks cast a disproportionately large shadow over organizations despite their seemingly modest success rates (typically hovering between one to three percent).

A striking revelation unfolds in the Ponemon Institute’s illuminating report, “Cost of Credential Stuffing.” This silent menace’s financial toll exacted on businesses averages a staggering $6 million annually. This financial hemorrhage manifests through application downtime, hemorrhaging customer bases, and a surge in IT costs, punctuating the harsh reality of credential stuffing’s impact.

Beyond fiscal repercussions, organizations find themselves trapped in a web of accountability. Regulatory bodies, attuned to the escalating threat of credential stuffing, wield the cudgel of stiff fines to hold entities responsible for lapses in cybersecurity. The public, too, demands transparency and protection. Inaction or negligence in implementing robust security measures renders companies liable to legal repercussions under stringent data privacy laws such as GDPR.

Is Credential Stuffing Effective?

Despite its seemingly unimpressive success rates, typically hovering between one to three percent, the impact of credential stuffing is far-reaching and profound. Its effectiveness lies not in the brute force numbers of successful infiltrations but in its attacks’ stealthy, persistent nature.

The effectiveness of credential stuffing is often measured not only in the accounts it successfully infiltrates but also in the broader consequences for targeted organizations. The compromised accounts become gateways for additional scams, fraudulent activities, and data theft. The attackers exploit the obtained information, ranging from personal data to stored payment details, perpetuating a ripple effect of financial losses and reputational damage.

Moreover, the relative ease and low cost of obtaining stolen credentials on the dark web contribute to the sustained effectiveness of credential-stuffing attacks. Criminals can purchase vast datasets for minimal amounts, providing a diverse arsenal to orchestrate their stealthy campaigns.

In essence, while the success rates might appear modest, the insidious effectiveness of credential stuffing lies in its ability to circumvent traditional security measures, exploit human vulnerabilities, and wreak havoc on individual users and targeted organizations. As defenders continue to fortify their cybersecurity postures, understanding the nuanced effectiveness of credential stuffing becomes paramount in mitigating its impact.

What Makes Credential Stuffing Different From Others?

Credential stuffing stands out as a distinct and stealthy intruder in the vast landscape of cyber threats, setting it apart from conventional attack methods. What makes credential stuffing different is its strategic exploitation of human behavior and the digital ecosystem.

Unlike overly aggressive approaches like brute force attacks, which systematically attempt to crack passwords, credential stuffing operates with finesse. It capitalizes on the common practice of users recycling passwords across multiple accounts. Leveraging stolen or breached username-password pairs, attackers systematically deploy automated tools to test these combinations across various online platforms.

The key differentiator is its subtlety. Instead of loudly banging on the front door, credential stuffing quietly navigates through the back alleys of cybersecurity. It exploits the vulnerability of password reuse, infiltrating user accounts without triggering immediate alarms. This strategic and inconspicuous approach sets credential stuffing apart, making it a formidable and challenging adversary in the constantly evolving digital security landscape.

How to Detect Credential Stuffing?

One potent method to detect credential stuffing is anomaly detection. By establishing a baseline of typical user behavior, any deviations can raise red flags. Unusual login times, multiple failed login attempts, or access from unfamiliar locations are indicators that merit closer scrutiny. Advanced security systems equipped with artificial intelligence and machine learning capabilities excel in recognizing these anomalies, providing an extra layer of defense.

Monitoring for high-velocity login attempts is another effective strategy. Credential stuffing attacks are characterized by rapid-fire login sequences, attempting to breach accounts swiftly. By implementing rate limiting or CAPTCHA challenges after a certain number of login attempts, organizations can thwart the rapid automation integral to credential stuffing.

Additionally, leveraging threat intelligence feeds can enhance detection capabilities. These feeds aggregate data from diverse sources, offering insights into known malicious IPs, compromised credentials, and emerging attack patterns. Integrating such intelligence into security protocols empowers organizations to stay ahead of evolving credential-stuffing tactics.

User behavior analytics (UBA) is a valuable ally in the quest for detection. UBA systems analyze behavior patterns, flagging deviations that might indicate a compromised account. By scrutinizing factors like login times, device usage, and geographic locations, UBA adds a nuanced layer of scrutiny beyond traditional security measures.

Credential Stuffing Attacks vs. Brute Force Attacks

Credential stuffing, akin to a digital skeleton key, relies on reusing stolen login credentials across multiple platforms. Cybercriminals capitalize on users’ tendencies to recycle passwords, employing automated tools to inundate various sites with these pilfered combinations. This method sidesteps the need for intricate hacking techniques, relying instead on exploiting human behavior to unlock digital assets.

Conversely, brute force attacks adopt a more direct and forceful approach. Unleashing a barrage of login attempts using various username and password combinations, these attacks systematically exhaust all possible permutations until the correct one is discovered. Unlike the strategic finesse of credential stuffing, brute force attacks rely on sheer computational power and persistence.

The key distinction lies in the element of stealth. Credential stuffing thrives on inconspicuously reusing compromised credentials, making it challenging to detect amidst legitimate user activities. Brute force attacks, however, are conspicuous and generate a noticeable spike in login attempts. This subtle disparity subtly underscores organizations’ different challenges in defending against each threat.

How to Prevent Credential Stuffing?

Unleash the CAPTCHA Guardians

Integrate CAPTCHA challenges to thwart automated bots attempting to infiltrate your system. These visual puzzles act as gatekeepers, ensuring only legitimate users pass through.

Empower with MFA Sentinels

Elevate your defenses with Multifactor Authentication (MFA). By adding an extra layer beyond passwords, MFA fortifies your authentication process, demanding more than just a key to unlock the digital gates.

Reinforce with Password Bastions

Strengthen the foundations of your security by promoting robust password hygiene. Educate users on crafting intricate passwords, regularly updating them, and avoiding recycled combinations.

Sentinel Vigilance through Regular Authentication

Keep a watchful eye on authentication processes. Regularly audit and update your systems to ensure resilience against evolving threats. Staying one step ahead is paramount in the cybersecurity chess match.

Exile Intruders with IP Blocklisting

Adopt the proactive measure of IP blocklisting. Identify and block suspicious IP addresses associated with malicious activities, preventing unauthorized access and deterring potential infiltrators.

By integrating these proactive measures, organizations can create a formidable defense against credential stuffing, turning the tide in the ongoing battle for digital security.

How Companies Can Prevent Credential Stuffing?

Let’s delve into the arsenal of protective strategies:

Device Fingerprinting: Crafting Digital Identities

Utilizing JavaScript, we weave intricate digital fingerprints for each user session. These fingerprints, rich with details like operating systems, languages, browsers, and time zones, act as unique identifiers. Repeatedly deploying the same parameters may signal potential threats, such as brute force or credential-stuffing attacks.

IP Blacklisting: Sentinel Vigilance Against Invaders

Recognizing that attackers wield a limited array of IP addresses, we erect a formidable barrier by blacklisting IPs and attempting multiple account logins. To minimize false alarms, we log recent IPs associated with specific accounts, cross-referencing them with suspicious ones.

Rate-Limiting Non-Residential Traffic: Decoding Bot Behavior

Identifying traffic emanating from commercial data centers becomes elementary. We distinguish and deflect potential bot incursions by imposing stringent rate limits and promptly blocking or banning IPs exhibiting anomalous behavior.

Restricted Headless Browsers: Unmasking Automated Deceivers

With their discernible JavaScript calls, headless browsers are unmasked as non-human entities. This identification aids in flagging suspicious behavior, allowing for swift and precise counteraction against potential threats.

Strategic Usernames: Breaking the Link

Disrupting the commonality between email addresses and usernames fortifies our defenses. By prohibiting the use of email addresses as usernames, we diminish the likelihood of users replicating credentials across multiple platforms, adding an extra layer of security.

As the cyber landscape evolves, adopting these advanced safeguards ensures a resilient defense, fortifying digital infrastructures against the ever-persistent tide of cyber threats.

Examples of Credential Stuffing Attacks

Let’s delve into these real-life scenarios where organizations faced the brunt of credential stuffing attacks:

Dunkin Donuts: Brewing Trouble in the Perks Realm

In early 2019, Dunkin’ Donuts grappled with an account takeover affecting 1,200 of its 10 million customers. Cybercriminals exploited credentials from prior data breaches to infiltrate DD Perks rewards accounts, housing sensitive member information. The attackers’ motive was clear – selling access to compromised accounts with coveted reward points. This incident highlights the financial implications and reputational damage wrought by credential stuffing.

Disney+: Streaming Service Launch Sabotaged

The eagerly awaited launch of Disney+ was marred by disruptions as credential stuffing wreaked havoc. Within hours of the rollout, cybercriminals offered Disney+ account credentials for sale on dark web forums. Credential stuffing, involving massive testing of stolen usernames and passwords, enabled hackers to pinpoint valid credential pairs. This incident is a cautionary tale for new service launches, emphasizing the immediate threat credential stuffing poses to user accounts.

Poq: The Battle Against App Commerce Aggressors

Poq, a provider of app commerce solutions, faced relentless credential stuffing attacks, jeopardizing its customers’ accounts and integrity. In response, Poq adopted the DataDome bot protection solution at the platform level, enhancing its security posture. The implementation shielded Poq from sophisticated attacks and exemplified the efficacy of robust bot protection measures in mitigating account takeover risks.

The Motivation Behind Credential Stuffing & Credential Cracking

Successful credential stuffing or cracking attacks grant hackers unwarranted access to user accounts, leading to account takeover – a gateway to fraudulent activities. The aftermath includes the illicit monetization of compromised accounts, with access to linked financial accounts, credit cards, and personal data for potential identity theft.

The most lucrative avenue for attackers is credit card fraud, with the malicious practice of carding gaining traction. Stolen credit card details are sold on the dark web or used to make fraudulent purchases, particularly during peak shopping. Account takeover also facilitates the theft of customers’ private data, which can be monetized on the dark web or leveraged for harmful purposes, exposing organizations to various risks, including financial losses, legal repercussions, and damaged reputations.


The primary targets of credential stuffing attacks span industries such as e-commerce, finance, social media, IT, restaurants, retail, and travel. However, the universal vulnerability of any organization with a login page necessitates a proactive stance against the looming threat of credential stuffing and cracking attacks. The imperative is clear: fortify defenses, safeguard user accounts, and mitigate the multifaceted risks posed by these insidious cyber threats. Financial uncertainty can occur at any time. Protect your money and get emergency help with Beem.


What are credentials stuffing tools?

Specialized apps for automated injection of stolen credentials across online platforms.

Is credential stuffing a DDoS attack?

Different threats: credential stuffing targets user accounts, and DDoS overwhelms services.

What is the difference between credential stuffing and password spraying?

Both compromise accounts but differ in approach: automated injection vs systematic testing.

Is credential stuffing social engineering?

It is not social engineering; it relies on automated processes, not psychological manipulation.

Was this helpful?

Did you like the post or would you like to give some feedback? Let us know your opinion by clicking one of the buttons below!



Picture of Monica Aggarwal

Monica Aggarwal

A journalist by profession, Monica stays on her toes 24x7 and continuously seeks growth and development across all fronts. She loves beaches and enjoys a good book by the sea. Her family and friends are her biggest support system.


This page is purely informational. Beem does not provide financial, legal or accounting advice. This article has been prepared for informational purposes only. It is not intended to provide financial, legal or accounting advice and should not be relied on for the same. Please consult your own financial, legal and accounting advisors before engaging in any transactions.

Related Posts

ACH Fraud
ACH Fraud
Due to many people using the automated clearing house (ACH), hackers figured out ways to fraud and steal personal data. They use fake emails or harmful viruses to snatch personal details. Here's how to prevent ACH fraud.
Social Security Number
What is a Social Security Number?
A Social Security number (SSN) is a nine-digit identifier designated to a US citizen, permanent resident and temporary (working) resident to keep a track of their income and decide related benefits to them. Here's everything you need to know about a Social Security Number, including how it works.
Stop Payment – How to Cancel a Check & Stop Payment fees
There are many ways to request a stop payment, and the fee is different for each method. Most banks have the option to request a stop payment on the online banking website, computerized telephone banking, or customer service. A stop payment on a check is valid for six months.
How to cancel a lost or stolen check

Get up to $1,000 for emergencies

Send money to anyone in the US

Ger personalized financial insights

Monitor and grow credit score

Save up to 40% on car insurance

Get up to $1,000 for loss of income

Insure up to $1 Million

Coming Soon

File federal and state taxes at low cost

Quick estimate of your tax returns

Get up to $1,000 for emergencies

Send money to anyone in the US

Save big on auto insurance - compare quotes now!

Zip Code:
Zip Code: