CVE-2026-83526
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.63%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.63% probability · 50th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-434
- Source
- security@wordfence.com
EPSS moved from 0.6% on 10 October 2026 to 0.6% on 26 October 2026.
References
- https://github.com/foliovision/fv-wordpress-flowplayer/releases/tag/8.1.8
- https://plugins.trac.wordpress.org/browser/fv-player/trunk/controller/editor.php#L36
- https://plugins.trac.wordpress.org/browser/fv-player/trunk/controller/frontend.php#L1211
- https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/checker.php#L105
- https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/checker.php#L148
- https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/checker.php#L181
- https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/db-video.php#L855
- https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/db.php#L1102
- https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/db.php#L1173
- https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/db.php#L46
- https://www.wordfence.com/threat-intel/vulnerabilities/id/5c75cb7b-1ebe-411c-8664-848d741e40d4?source=cve
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.