CVE-2021-4356 Explained : Impact and Mitigation
Learn about CVE-2021-4356 affecting Frontend File Manager plugin versions up to 18.2 in WordPress, allowing unauthenticated attackers to download arbitrary files.
The Frontend File Manager plugin for WordPress is vulnerable to Unauthenticated Arbitrary File Download in versions up to, and including, 18.2. This may allow unauthenticated attackers to download arbitrary files on the site, potentially leading to a site takeover.
Understanding CVE-2021-4356
This section will provide an overview of CVE-2021-4356 and its impact.
What is CVE-2021-4356?
CVE-2021-4356 refers to a vulnerability in the Frontend File Manager plugin for WordPress that allows unauthenticated attackers to download arbitrary files due to lacking authentication protections and capability checks.
The Impact of CVE-2021-4356
The impact of this vulnerability includes the potential for sensitive data exposure, unauthorized file downloads, and possible site takeover by malicious actors.
Technical Details of CVE-2021-4356
In this section, we will delve into the specifics of the vulnerability.
Vulnerability Description
The vulnerability in Frontend File Manager plugin versions up to 18.2 allows unauthenticated attackers to exploit the wpfm_file_meta_update AJAX action to download arbitrary files.
Affected Systems and Versions
The Frontend File Manager plugin versions up to and including 18.2 are affected by this vulnerability.
Exploitation Mechanism
The lack of authentication protections and capability checks on the wpfm_file_meta_update AJAX action allows unauthenticated attackers to exploit this vulnerability and download files.
Mitigation and Prevention
To safeguard against CVE-2021-4356, it is crucial to implement immediate steps and adopt long-term security measures.
Immediate Steps to Take
Immediately update the Frontend File Manager plugin to version 18.3 or higher and restrict access to sensitive files and directories.
Long-Term Security Practices
Regularly monitor for plugin updates, conduct security audits, and educate users on best practices for file management and permissions.
Patching and Updates
Stay vigilant for security advisories from plugin developers and promptly apply patches and updates to mitigate known vulnerabilities.