Login Nocaptcha Was Bypassed On Login Page Xmlrpc.php

Recently, I came across an interesting security vulnerability that I wanted to share with you all. It involves the login process on a website and specifically the use of the “nocaptcha” feature. This feature is designed to prevent automated bots from accessing the website by requiring users to complete a captcha verification before logging in.

However, during my research, I discovered that the login nocaptcha was bypassed on the login page “xmlrpc.php”. This finding raises concerns about the effectiveness of such security measures and the potential for unauthorized access to sensitive information.

When a user visits the login page, they are usually presented with a captcha challenge to prove they are human. This challenge can take the form of selecting certain images, solving a math problem, or entering text from a distorted image. The nocaptcha feature is meant to simplify this process by only requiring users to tick a checkbox that says “I’m not a robot”. But unfortunately, this simplification has also made it easier for malicious actors to bypass the security measure.

To exploit this vulnerability, attackers can send a specially crafted request to the xmlrpc.php endpoint, bypassing the captcha requirement. This can be done by manipulating the parameters in the request to fool the server into thinking that the captcha has been completed successfully. As a result, the attacker gains unauthorized access to the login page without having to go through the captcha verification process.

This vulnerability highlights the importance of regularly updating and patching website software to protect against such security risks. It also serves as a reminder that even seemingly robust security features can be bypassed by determined attackers. As developers, we must constantly stay vigilant and proactive in identifying and addressing these vulnerabilities to ensure the safety and integrity of our users’ data.

If you are a website owner, it is crucial to be aware of this vulnerability and take immediate steps to mitigate the risk. One possible solution is to implement additional layers of security, such as multi-factor authentication or IP blocking, to supplement the nocaptcha feature. Additionally, it is advisable to monitor the website’s access logs for any suspicious activity or unauthorized login attempts.


The bypassing of the login nocaptcha on the login page xmlrpc.php brings attention to the importance of robust security measures and the need for continuous monitoring and updating of websites. While the nocaptcha feature was designed to streamline the user experience, it inadvertently introduced a vulnerability that can be exploited by malicious actors.

As developers and website owners, it is our responsibility to stay informed about the latest security threats and vulnerabilities and take appropriate measures to protect against them. Regularly updating and patching software, implementing additional security layers, and monitoring access logs are all crucial steps in ensuring the security of our websites and the protection of our users’ data.

Remember, security should always be a top priority. Let’s work together to build a safer online environment.