A Stored Cross-Site Scripting (XSS) vulnerability has been discovered in the EyouCMS v1.6.3 content management system. The vulnerability exists in the filing number field of the Basic Information tab under the backend management page. This could enable cybercriminals to potentially inject malicious code into the web application, compromising users' data and taking control of their actions.

Exploit Details

The vulnerability lies in the filing number input field of the Basic Information tab, which does not sufficiently sanitize user input. This allows attackers to inject malicious JavaScript code that will be stored in the system and executed by other users when they interact with the compromised web application.

Here's an example code snippet demonstrating the issue

<!-- Vulnerable code in EyouCMS v1.6.3 -->
<input type="text" name="filing_number" id="filing_number" value="<%=filing_number%>">

As you can see, the 'filing_number' value is directly output without proper sanitization, allowing the attacker to inject malicious JavaScript code that will execute when other users access the Basic Information tab.

An example of the injected code could be

<script>alert("XSS Exploit");</script>

Official References

1. EyouCMS Official Website
2. CVE-2023-36093 - NVD (National Vulnerability Database)

Mitigation Steps

To mitigate this issue, users should immediately upgrade their EyouCMS version to the latest release available on the official website. Additionally, implement proper input filtering and validation mechanisms to prevent unexpected malicious inputs.

Developers can employ input sanitization and validation to mitigate the risk of Stored XSS vulnerabilities, such as using htmlspecialchars() function in PHP to encode special characters in user inputs or employing Content Security Policy (CSP) headers in the web application to restrict the locations from which scripts can be executed.

Webmasters using EyouCMS should consider installing and configuring a Web Application Firewall (WAF) to act as an additional security layer, protecting the application from malicious inputs and potential exploitation.

For users accessing the web application, ensure that they are using the latest versions of web browsers with built-in security features to protect against potential XSS attacks.


The EyouCMS v1.6.3 Stored XSS vulnerability (CVE-2023-36093) allows cybercriminals to inject malicious code, compromising user data and potentially hijacking their actions. Ensuring proper input filtering, validation, and upgrading to the latest version of EyouCMS can mitigate the vulnerability and protect users from potential security breaches.


Published on: 06/22/2023 15:15:00 UTC
Last modified on: 06/28/2023 07:22:00 UTC