Sneaky Attacks: Critical Account Deletion Vulnerability

Laburity Research Team


In the dynamic landscape of cybersecurity, unearthing vulnerabilities is crucial to fortifying digital platforms. Today, we unravel a significant flaw that allows an attacker to delete anyone’s account by exploiting the nuances of email address registration.

The Discovery:

In our assessment, we stumbled upon a vulnerability that hinges on the subtleties of email addresses during account creation. The web application’s registration process doesn’t differentiate between uppercase and lowercase letters. This oversight becomes the gateway for attackers to delete a victim’s account without breaking a sweat.

How It Works:

The vulnerability exposes a flaw in the account registration functionality. Normally, the system should recognize that “[email protected]” and “[email protected]” are the same email addresses. However, due to a lack of proper validation, an attacker can exploit this by creating an account with the same name but with an upper case letter – in this case, “[email protected].”


The ramifications are severe. An attacker, armed only with knowledge of the victim’s email address, can entirely disable the victim’s account. This isn’t just a minor inconvenience; it falls under the critical impact category, as it grants attackers the power to delete or disable any account at will.

While performing the audit we also noticed that there was no rate limit protection on the registration page. This would have allowed an attacker to mass register and eventually disable real user email addresses.


To mitigate this vulnerability, a simple yet effective solution is proposed. During registration, the system should recognize email addresses with case sensitivity. If a user attempts to register with the same email but in a different case, they should be prompted to log in to their existing account.


In the ever-evolving landscape of cybersecurity, no platform is immune to vulnerabilities. Identifying and rectifying these issues is a collective effort. This discovery emphasizes the need for vigilance in the development and testing phases to ensure robust security measures, protecting users from potential malicious activities.

Closing Thoughts:

As we navigate the digital realm, it’s crucial to acknowledge and address vulnerabilities promptly. By doing so, we contribute to a safer online environment where users can trust that their accounts are secure. Together, let’s build a digital landscape resilient to the tricks of would-be attackers.

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