Vulnerability Description
The Perfmatters plugin for WordPress is vulnerable to arbitrary file deletion via path traversal in all versions up to, and including, 2.5.9.1. This is due to the `PMCS::action_handler()` method processing the `$_GET['delete']` parameter without any sanitization, authorization check, or nonce verification. The unsanitized filename is concatenated with the storage directory path and passed to `unlink()`. This makes it possible for authenticated attackers, with Subscriber-level access and above, to delete arbitrary files on the server by using `../` path traversal sequences, including `wp-config.php` which would force WordPress into the installation wizard and allow full site takeover.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://perfmatters.io/docs/changelog/
- https://www.wordfence.com/threat-intel/vulnerabilities/id/58b9dab8-8539-4b53-b08
FAQ
What is CVE-2026-4350?
CVE-2026-4350 is a vulnerability with a CVSS score of 8.1 (HIGH). The Perfmatters plugin for WordPress is vulnerable to arbitrary file deletion via path traversal in all versions up to, and including, 2.5.9.1. This is due to the `PMCS::action_handler()` method proce...
How severe is CVE-2026-4350?
CVE-2026-4350 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-4350?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.