CVE-2021-43687 : Vulnerability Insights and Analysis

Chamilo-LMS v1.11.14 is affected by a Cross Site Scripting (XSS) vulnerability in /plugin/jcapture/applet.php if an attacker passes a message hex2bin in the cookie.

Understanding CVE-2021-43687

Chamilo-LMS version 1.11.14 is susceptible to a XSS vulnerability that can be exploited through specific parameters in the cookie.

What is CVE-2021-43687?

The CVE-2021-43687 vulnerability involves a Cross Site Scripting (XSS) issue in Chamilo-LMS version 1.11.14, which allows attackers to execute malicious scripts in a user's browser.

The Impact of CVE-2021-43687

This vulnerability can enable attackers to execute arbitrary script code in the context of the targeted user's browser, potentially leading to unauthorized actions or data theft.

Technical Details of CVE-2021-43687

Chamilo-LMS version 1.11.14 is affected by a specific security flaw.

Vulnerability Description

The XSS vulnerability in /plugin/jcapture/applet.php of Chamilo-LMS v1.11.14 allows attackers to inject and execute malicious scripts using a crafted message in the cookie.

Affected Systems and Versions

Product: Chamilo-LMS
Version: 1.11.14

Exploitation Mechanism

Attackers pass a message hex2bin in the cookie to trigger the XSS vulnerability in /plugin/jcapture/applet.php.

Mitigation and Prevention

To address CVE-2021-43687, consider the following steps.

Immediate Steps to Take

Disable the use of the affected plugin or update it to a non-vulnerable version.
Implement input validation to sanitize user inputs effectively.

Long-Term Security Practices

Regularly audit and review your codebase for security vulnerabilities.
Educate users and administrators about the risks of XSS attacks.

Patching and Updates

Apply patches and updates provided by Chamilo-LMS promptly to fix the vulnerability.