FV Player 8 <= 8.1.7 - Authenticated (Subscriber+) Arbitrary File Upload via videos[].fv_wp_flowplayer_field_src Parameter
Summary
| CVE | CVE-2026-83526 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-10 06:16:43 UTC |
| Updated | 2026-10-13 13:29:12 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 8.8 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.006440000 probability, percentile 0.494450000 (date 2026-10-12)
Problem Types: CWE-434 | CWE-434 CWE-434 Unrestricted Upload of File with Dangerous Type
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Foliovision | FV Player 8 | affected 8.1.7 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| plugins.trac.wordpress.org/browser/fv-player/trunk/controller/frontend.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/fv-player/trunk/models/db-video.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/fv-player/trunk/models/checker.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/fv-player/trunk/controller/editor.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/fv-player/trunk/models/db.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/fv-player/trunk/models/checker.php | [email protected] | plugins.trac.wordpress.org | |
| github.com/foliovision/fv-wordpress-flowplayer/releases/tag/8.1.8 | [email protected] | github.com | |
| www.wordfence.com/threat-intel/vulnerabilities/id/5c75cb7b-1ebe-411c-8664-848d7... | [email protected] | www.wordfence.com | |
| plugins.trac.wordpress.org/browser/fv-player/trunk/models/db.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/fv-player/trunk/models/db.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/fv-player/trunk/models/checker.php | [email protected] | plugins.trac.wordpress.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Supakiad S. (m3ez) (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-09-02T15:44:33.000Z | Vendor Notified |
| CNA | 2026-10-09T17:08:42.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.