W3 Total Cache Critical Remote Code Execution Vulnerability
A critical remote code execution (RCE) vulnerability, designated CVE-2025-9501, affecting over a million WordPress websites utilizing the W3 Total Cache plugin. This security flaw stems from an unauthenticated command injection weakness in the plugin’s page caching functionality, specifically where it processes dynamic content using the dangerous eval() function, allowing attackers to potentially take complete control of compromised sites. The document thoroughly explains the prerequisites for a successful exploit, such as the need for comments and page caching to be enabled, and the importance of the W3TC_DYNAMIC_SECURITY constant. Furthermore, the text provides immediate action steps for administrators, including updating to the latest patched version and implementing temporary mitigation strategies, while also offering the cybersecurity services of Technijian for managed security and incident response.
