CVE-2026-83526: Foliovision Fv Player 8

High severity, CVSS 8.8. EPSS: 0.6% chance of exploitation in the next 30 days.

The FV Player 8 plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 8.1.7 via the check_mimetype function. This is due to insufficient file type validation in check_mimetype(), which writes attacker-supplied remote file content to the public uploads directory before any MIME or extension check, combined with a missing capability check on new player creation. This makes it possible for authenticated attackers, with subscriber-level access and above, to upload files that may be executable, which makes remote code execution possible. This requires successfully exploiting a race condition.

Affected products

• Foliovision Fv Player 8: up to and including 8.1.7

Published 2026-10-10. Last modified 2026-10-10.