# CVE-2026-120408: All-in-One Video Gallery stored XSS via thumbnail URL

Source: https://junglewise.ai/threats/cve-2026-120408-the-all-in-one-video-gallery-wordpress-plugin-before-5-1-0-does  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-06. Updated: 2026-11-06  
License: CC BY 4.0 with a link back

CVE-2026-120408 · Severity: info · Published 2026-11-06

The All-in-One Video Gallery WordPress plugin allows users with Subscriber access to inject malicious code into video thumbnail URLs, which is then executed when administrators view the video list in WordPress. An attacker can exploit this to steal administrator credentials, modify site content, or perform other administrative actions without the administrator's knowledge.

Technologies: [All-in-One Video Gallery](https://junglewise.ai/threats/technologies/all-in-one-video-gallery-all-in-one-video-gallery). Vendors: [All-in-One Video Gallery](https://junglewise.ai/threats/vendors/all-in-one-video-gallery).

## Quick answers

**Is CVE-2026-120408 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-120408 being exploited in the wild.

**How severe is CVE-2026-120408?** Informational severity, published 6 November 2026.

**Which products and versions are affected?** All-in-One Video Gallery before 5.1.0.

**Is there a fix for CVE-2026-120408?** Yes: fixed in 5.1.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-120408 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-120408?** Check whether you run All-in-One Video Gallery 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.

## How to fix

- Fixed in 5.1.0

## Technical details

A stored cross-site scripting (XSS) vulnerability exists in the plugin due to insufficient output escaping of video thumbnail URLs in the admin video list and missing sanitization when the value is written outside the plugin's editor. An unauthenticated or low-privileged user (Subscriber role) can inject malicious JavaScript through the image post meta field, which will be executed in administrators' browsers when they view the admin page.

## Affected products

- All-in-One Video Gallery All-in-One Video Gallery before 5.1.0

## Timeline

- 2026-11-03: disclosed
- 2026-11-06: advisory

## References

- [https://wpscan.com/vulnerability/ddbbaa38-e9cc-416f-8b3f-72d721f82dc3/](https://wpscan.com/vulnerability/ddbbaa38-e9cc-416f-8b3f-72d721f82dc3/)

## Related threats

- [All-in-One Video Gallery stored XSS in shortcode attributes](https://junglewise.ai/threats/cve-2026-118783-the-all-in-one-video-gallery-wordpress-plugin-before-5-0-0-does)
- [All-in-One Video Gallery information disclosure of private videos](https://junglewise.ai/threats/cve-2026-118629-the-all-in-one-video-gallery-wordpress-plugin-before-5-0-0-does)
- [All-in-One Video Gallery plugin stored cross-site scripting](https://junglewise.ai/threats/cve-2026-109209-the-all-in-one-video-gallery-video-player-galleries-for-youtube)