CVE-2026-83526
FV Player 8 WordPress plugin remote code execution
- Published10 Oct 2026
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 breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HRemediation
No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.
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.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://plugins.trac.wordpress.org/browser/fv-player/trunk/models/db-video.php#L855
and 1 more references
Related CVEs
Recent high-severity vulnerabilities sharing a weakness type.
Frequently asked
Is CVE-2026-83526 being actively exploited?
CVE-2026-83526 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.64%.
How severe is CVE-2026-83526?
CVE-2026-83526 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 0.64% probability of exploitation.
How do I fix CVE-2026-83526?
Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2026-83526 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.