CVE-2026-83526 File upload in FV Player 8
Authenticated subscribers can upload executable files via a race condition in FV Player, leading to remote code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-83526?
CVE-2026-83526 is a high-severity vulnerability in foliovision FV Player 8, published on 10 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-434
Which versions are affected by CVE-2026-83526?
How do I fix CVE-2026-83526?
No fix has been published for CVE-2026-83526 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-83526 being exploited?
There is no known exploitation of CVE-2026-83526 in the wild and no public exploit code.
Sources
Also known as GHSA-p776-3xx4-5fcg.