CVE-2021-24209 : Exploit Details and Defense Strategies

WP Super Cache < 1.7.2 - Authenticated Remote Code Execution (RCE)

Understanding CVE-2021-24209

This CVE involves an authenticated Remote Code Execution (RCE) vulnerability in WP Super Cache plugin versions older than 1.7.2.

What is CVE-2021-24209?

The WP Super Cache plugin before version 1.7.2 is vulnerable to an authenticated RCE due to input validation failure in the Cache Location option, allowing attackers to execute malicious code remotely.

The Impact of CVE-2021-24209

This vulnerability can be exploited by authenticated users with admin privileges to execute arbitrary code, potentially leading to unauthorized access and control over the affected WordPress site.

Technical Details of CVE-2021-24209

In this section, we will delve into the technical aspects of the CVE.

Vulnerability Description

The vulnerability arises from input validation issues and weak $cache_path checks in the WP Super Cache Settings, specifically the Cache Location option. Attackers can leverage this flaw for web shell injection.

Affected Systems and Versions

The affected product is WP Super Cache, versions less than 1.7.2. Users with versions prior to this are at risk of being impacted by this vulnerability.

Exploitation Mechanism

Attackers need authenticated admin access to exploit the vulnerability. By manipulating the Cache Location option and utilizing the weak $cache_path check, attackers can achieve RCE.

Mitigation and Prevention

To secure your system from CVE-2021-24209, take the following steps:

Immediate Steps to Take

Update WP Super Cache to version 1.7.2 or newer to mitigate the vulnerability.
Monitor and restrict admin privileges to reduce the risk of unauthorized code execution.

Long-Term Security Practices

Regularly audit and update WordPress plugins to ensure the latest security patches are in place.
Educate users on secure coding practices and the importance of input validation.

Patching and Updates

Visit the provided URLs for detailed technical descriptions, exploits, patches, and credits related to this vulnerability.