CVE-2021-24639 : Exploit Details and Defense Strategies

The OMGF WordPress plugin before version 4.5.4 is affected by a vulnerability that allows authenticated users to delete arbitrary files or folders on the server due to missing path validation, authorization, and CSRF checks.

Understanding CVE-2021-24639

This CVE involves the OMGF WordPress plugin, affecting versions prior to 4.5.4, allowing authenticated users to delete files or folders on the server.

What is CVE-2021-24639?

The vulnerability lies in the omgf_ajax_empty_dir AJAX action of the OMGF plugin, where path validation, authorization, and CSRF checks are not enforced, enabling authenticated users to delete arbitrary server files or folders.

The Impact of CVE-2021-24639

The security flaw in the OMGF WordPress plugin could be exploited by authenticated users to maliciously delete sensitive files or directories, leading to data loss or unauthorized access.

Technical Details of CVE-2021-24639

The technical details of CVE-2021-24639 include:

Vulnerability Description

The vulnerability results from the lack of proper path validation, authorization, and CSRF checks in the omgf_ajax_empty_dir AJAX action of the OMGF WordPress plugin.

Affected Systems and Versions

OMGF plugin versions below 4.5.4 are impacted by this vulnerability, allowing any authenticated user to delete files or folders.

Exploitation Mechanism

By leveraging the lack of proper security measures, attackers with authenticated access can send malicious requests to the omgf_ajax_empty_dir action, leading to file or folder deletion.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-24639, consider the following steps:

Immediate Steps to Take

Update to version 4.5.4 of the OMGF WordPress plugin to patch the vulnerability.
Monitor server logs and file system changes for any suspicious activities.

Long-Term Security Practices

Regularly update all WordPress plugins and themes to mitigate security risks.
Implement strict access controls and user permissions to limit file modification capabilities.

Patching and Updates

Stay informed about security updates and patches released by the plugin developer to address vulnerabilities promptly.