FV Player 8 <= 8.1.7 — Authenticated (Subscriber+) Arbitrary File Upload via videos[].fv_wp_flowplayer_field_src Parameter

Am I affected?

• Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under FV Player 8.
• No admin access? Run a passive check of your site. It reads public files only.

What to do

1. Update to version 8.1.8, or a newer patched version
2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
3. Watch FV Player 8 to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Supakiad S. (m3ez).

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, and is only exploitable if the '[fvplayer_editor]' shortcode is present, or the "Enable profile videos" setting is enabled.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

• Advisorywordfence.com

Related CVEs

Timeline

1. Oct 9, 2026

   CVE published

   Severity high, CVSS 8.8

2. Nov 13, 2026

   Record last updated