CVE-2026-4350
HIGH 8.1EPSS 0.7%
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 v3.1
- 8.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H - EPSS
- 0.66% chance of exploitation in the next 30 days, 49th percentile
- Published
- 2026-04-03
- Updated
- 2026-04-08
Proof-of-concept exploits (1)
- whyiamsobusy/CVE-2026-43500★ · 2026-04-11