CVE-2026-83526
highThe 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.
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/foliovision/fv-wordpress-flowplayer/releases/tag/8.1.8 security@wordfence.com
- https://plugins.trac.wordpress.org/browser/fv-player/trunk/controller/editor.php#L36 security@wordfence.com
- https://plugins.trac.wordpress.org/browser/fv-player/trunk/controller/frontend.php#L1211 security@wordfence.com
- https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/checker.php#L105 security@wordfence.com
- https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/checker.php#L148 security@wordfence.com
- https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/checker.php#L181 security@wordfence.com
- https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/db-video.php#L855 security@wordfence.com
- https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/db.php#L1102 security@wordfence.com
- https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/db.php#L1173 security@wordfence.com
- https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/db.php#L46 security@wordfence.com
- https://www.wordfence.com/threat-intel/vulnerabilities/id/5c75cb7b-1ebe-411c-8664-848d741e... security@wordfence.com