CVE-2026-86461: FV Flowplayer Video Player arbitrary file upload vulnerability
high 8.8 published 2026-10-14 · updated 2026-10-15
- Affected versions
- 7.5.54.7212 and older
- Fixed in
- unknown
- Latest version
- 7.5.57.7212
- Severity
- High · CVSS 8.8
- Active installs
- 10,000+
- Type
- Arbitrary file upload
What an attacker needs
- Access: A logged-in account with Subscriber-level access or higher.
CVSS vector (score by Wordfence): CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
What to do now
- Update FV Flowplayer Video Player to the latest version (7.5.57.7212). The record does not name a fixed version, so also read the advisory below.
- If you cannot update right away, deactivate it until you can.
- Not sure which version you run? Check your version against every known FV Flowplayer Video Player issue.
With WP-CLI:
wp plugin get fv-wordpress-flowplayer --field=version. - If you ran an affected version and something looks off (new admin users, spam pages, redirects), run the free scan below.
The advisory
The FV Flowplayer Video Player plugin for WordPress is vulnerable to Limited Arbitrary File Upload in all versions up to, and including, 7.5.54.7212 via the check_mimetype function. This is due to incomplete file type validation in the check_mimetype function — while some extension checking is present, it can be bypassed, allowing attacker-supplied remote file content to be written with insufficient extension enforcement and no MIME check or WordPress upload helper. 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. Exploitation requires the plugin's 'profile videos on bio' option to be enabled, as this causes the nonce to be emitted on the subscriber-accessible profile page; without this setting, authenticated users below Editor cannot obtain the required nonce.
References
- NVD CVE-2026-86461 nvd.nist.gov
- Wordfence advisory www.wordfence.com
- Code change (fix) plugins.trac.wordpress.org
- Plugin source plugins.trac.wordpress.org
Related
Ran an affected version? Check your site for signs of a hack
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Where this data comes from
- CVE record, score and references: NIST National Vulnerability Database (NVD), checked 2026-11-04. This product uses data from the NVD API but is not endorsed or certified by the NVD.
- Versions and install counts: wordpress.org/plugins/fv-wordpress-flowplayer (Plugins API), fetched 2026-11-04.
- The summary, “what an attacker needs” and “what to do” sections are our plain-English reading of the record and the plugin's release history; the quoted description is the record's own text. Spot an error? Email Daniel.