CVE-2026-4351 Perfmatters <= 2.5.9 - Authenticated (Subscriber+) Arbitrary File Overwrite via 'snippets' Parameter

The Perfmatters plugin for WordPress is vulnerable to arbitrary file overwrite via path traversal in all versions up to, and including, 2.5.9. This is due to the PMCS::actionhandler method processing the bulk action activate/deactivate handlers without any authorization check or nonce verificatio...