FV Flowplayer Video Player: Cross-site scripting

FV Flowplayer Video Player can process a crafted synopsis shortcode in a public comment and render stored script. The unauthenticated route requires parse_comments to be enabled and the player to use liststyle=season. The export does not identify another route that removes those prerequisites. Published affected versions: <= 7.5.54.7212.

CVE / CNA score 7.2 CVSS 3.1 · security@wordfence.com

NVD score Pending NVD has not published its own CVSS assessment.

Component: FV Flowplayer Video Player
Plugin slug: fv-wordpress-flowplayer
Affected: <= 7.5.54.7212
Safe version: 7.5.55.7212
Published: Oct 14, 2026
Weakness: CWE-79 — Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

This CVE was published Oct 14, 2026 and is one of 24 known issues for this plugin.

What to do

Update, patch or deactivate.

Update FV Flowplayer Video Player to 7.5.55.7212 or later in the same release line. The official author changelog identifies a matching fix. Official release notes: https://wordpress.org/plugins/fv-wordpress-flowplayer/#developers.

A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

The FV Flowplayer Video Player plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'synopsis' Shortcode Attribute in all versions up to, and including, 7.5.54.7212 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the 'Parse Vimeo and YouTube links' (parse_comments) option to be enabled and the liststyle attribute set to "season" for the vulnerable code path to be reached.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

References

Primary and upstream sources

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