CVE-2021-24312 : Vulnerability Insights and Analysis

WP Super Cache < 1.7.3 - Authenticated Remote Code Execution

Understanding CVE-2021-24312

This CVE pertains to an authenticated remote code execution vulnerability in the popular WordPress plugin WP Super Cache versions before 1.7.3. The vulnerability allows attackers to execute arbitrary code due to improper control of code generation.

What is CVE-2021-24312?

The CVE-2021-24312 vulnerability in WP Super Cache versions prior to 1.7.3 enables remote authenticated attackers to conduct remote code execution by injecting malicious input through specific parameters in the plugin settings.

The Impact of CVE-2021-24312

Exploitation of this vulnerability could lead to severe consequences, allowing attackers to execute arbitrary code within the context of the affected application, potentially compromising the entire WordPress site and its data.

Technical Details of CVE-2021-24312

This section provides a deeper look into the vulnerability and its technical aspects.

Vulnerability Description

The flaw arises from the parameters $cache_path, $wp_cache_debug_ip, $wp_super_cache_front_page_text, $cache_scheduled_time, and $cached_direct_pages used in WP Super Cache versions prior to 1.7.3. Attackers can abuse these parameters to inject malicious code containing '$' and '\n', leading to remote code execution.

Affected Systems and Versions

WP Super Cache versions before 1.7.3 are vulnerable to this authenticated remote code execution issue. Users with versions lower than 1.7.3 are advised to upgrade immediately to mitigate the risk of exploitation.

Exploitation Mechanism

By abusing the mentioned parameters in the plugin settings, attackers are able to input malicious code snippets containing special characters that can trigger remote code execution, compromising the security and integrity of the WordPress site.

Mitigation and Prevention

Protecting systems from CVE-2021-24312 requires immediate action and long-term security measures.

Immediate Steps to Take

Update WP Super Cache to version 1.7.3 or later immediately after the release of the fix.
Monitor the official WP Super Cache website for security advisories and apply patches promptly.

Long-Term Security Practices

Regularly update all WordPress plugins and themes to the latest versions to prevent security vulnerabilities.
Implement robust access controls and user permissions to mitigate the impact of authenticated attacks.

Patching and Updates

Stay informed about security updates and patches released by Automattic for WP Super Cache. Timely patching is crucial to address known vulnerabilities and enhance the security posture of WordPress installations.