CVE-2021-20187 : Vulnerability Insights and Analysis

A vulnerability has been identified in Moodle versions before 3.10.1, 3.9.4, 3.8.7, and 3.5.16 that allows site administrators to execute arbitrary PHP scripts via a PHP include used during Shibboleth authentication.

Understanding CVE-2021-20187

This CVE refers to a security flaw in Moodle that enables unauthorized execution of PHP scripts.

What is CVE-2021-20187?

The vulnerability in Moodle versions prior to 3.10.1, 3.9.4, 3.8.7, and 3.5.16 allows site administrators to run PHP scripts without proper authorization.

The Impact of CVE-2021-20187

CVE-2021-20187 poses a significant risk as it can be exploited by malicious actors to execute unauthorized PHP scripts on affected systems.

Technical Details of CVE-2021-20187

This section delves into the specifics of the vulnerability.

Vulnerability Description

The flaw in Moodle versions before 3.10.1, 3.9.4, 3.8.7, and 3.5.16 permits site administrators to execute PHP scripts via a PHP include during Shibboleth authentication.

Affected Systems and Versions

Moodle versions earlier than 3.10.1, 3.9.4, 3.8.7, and 3.5.16 are vulnerable to this security issue.

Exploitation Mechanism

Malicious site administrators can exploit this vulnerability to execute unauthorized PHP scripts, potentially leading to system compromise.

Mitigation and Prevention

Discover strategies to address and prevent exploitation of CVE-2021-20187.

Immediate Steps to Take

Site administrators should update Moodle to version 3.10.1 or newer to mitigate the vulnerability.

Long-Term Security Practices

Implement strict access controls and regularly monitor for unauthorized activities to enhance system security.

Patching and Updates

Regularly apply security patches and updates provided by Moodle to safeguard against known vulnerabilities.