# CVE-2026-12135: Foliovision FV Flowplayer Video Player Stored XSS in video_player shortcode

Source: https://junglewise.ai/threats/cve-2026-12135-foliovision-fv-flowplayer-video-player-stored-xss-in-video-player  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-01. Updated: 2026-07-01  
License: CC BY 4.0 with a link back

CVE-2026-12135 · Severity: medium · CVSS 6.4 · Published 2026-07-01

The FV Flowplayer Video Player plugin for WordPress, which is used to embed and manage video content on websites, contains a security flaw. This vulnerability allows users with contributor-level access or higher to inject malicious scripts into website pages. When other users or administrators visit these pages, the scripts can execute, potentially leading to unauthorized actions or data theft.

Technologies: [FolioVision FV Flowplayer Video Player](https://junglewise.ai/threats/technologies/fv-flowplayer-video-player). Vendors: [FolioVision](https://junglewise.ai/threats/vendors/foliovision).

## Quick answers

**Is CVE-2026-12135 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-12135 being exploited in the wild.

**How severe is CVE-2026-12135?** Medium severity, with a CVSS score of 6.4, published 1 July 2026.

**Which products and versions are affected?** FolioVision FV Flowplayer Video Player up to, and including, 7.5.51.7212.

**Is there a fix for CVE-2026-12135?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-12135 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-12135?** Check whether you run FolioVision FV Flowplayer Video Player at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The FV Flowplayer Video Player plugin for WordPress is vulnerable to Stored Cross-Site Scripting (XSS) due to insufficient input sanitization and output escaping on the 'align' attribute within the 'video_player' shortcode. An authenticated attacker with at least contributor-level permissions can exploit this by injecting arbitrary web scripts into a post or page. These scripts will execute in the context of any user's browser who views the affected page. The vulnerability exists in all versions up to and including 7.5.51.7212. A patch has been released in subsequent versions to address the improper neutralization of user-supplied input.

## Affected products

- Foliovision FV Flowplayer Video Player up to, and including, 7.5.51.7212

## Timeline

- 2026-07-01: disclosed
- 2026-07-01: advisory

## References

- [https://plugins.trac.wordpress.org/browser/fv-wordpress-flowplayer/tags/7.5.49.7212/controller/shortcodes.php](https://plugins.trac.wordpress.org/browser/fv-wordpress-flowplayer/tags/7.5.49.7212/controller/shortcodes.php)
- [https://plugins.trac.wordpress.org/browser/fv-wordpress-flowplayer/tags/7.5.49.7212/controller/shortcodes.php](https://plugins.trac.wordpress.org/browser/fv-wordpress-flowplayer/tags/7.5.49.7212/controller/shortcodes.php)
- [https://plugins.trac.wordpress.org/browser/fv-wordpress-flowplayer/trunk/controller/shortcodes.php](https://plugins.trac.wordpress.org/browser/fv-wordpress-flowplayer/trunk/controller/shortcodes.php)
- [https://plugins.trac.wordpress.org/browser/fv-wordpress-flowplayer/trunk/controller/shortcodes.php](https://plugins.trac.wordpress.org/browser/fv-wordpress-flowplayer/trunk/controller/shortcodes.php)
- [https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3586305%40fv-wordpress-flowplayer%2Ftrunk&old=3557974%40fv-wordpress-flowplayer%2Ftrunk&sfp_email=&sfph_mail=](https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3586305%40fv-wordpress-flowplayer%2Ftrunk&old=3557974%40fv-wordpress-flowplayer%2Ftrunk&sfp_email=&sfph_mail=)
- [https://www.wordfence.com/threat-intel/vulnerabilities/id/d5a3a560-08e6-43b7-b953-4e704eafc49b?source=cve](https://www.wordfence.com/threat-intel/vulnerabilities/id/d5a3a560-08e6-43b7-b953-4e704eafc49b?source=cve)

## Related threats

- [FolioVision FV Flowplayer Video Player stored XSS](https://junglewise.ai/threats/cve-2026-121764-improper-neutralization-of-input-during-web-page-generation)
- [FV Flowplayer Video Player stored XSS in comment parsing](https://junglewise.ai/threats/cve-2026-117525-the-fv-flowplayer-video-player-wordpress-plugin-before-7-5-57)
- [FV Flowplayer Video Player stored XSS in comment parameter](https://junglewise.ai/threats/cve-2026-121515-the-fv-flowplayer-video-player-plugin-for-wordpress-is)
- [FV Flowplayer Video Player stored XSS in profile videos](https://junglewise.ai/threats/cve-2026-110533-the-fv-flowplayer-video-player-plugin-for-wordpress-is)
- [FV Flowplayer Video Player stored XSS via align attribute](https://junglewise.ai/threats/cve-2026-110001-the-fv-flowplayer-video-player-plugin-for-wordpress-is)