Stored Cross-Site Scripting Vulnerability in YouTube Showcase Plugin by WordPress
CVE-2026-15790

6.4MEDIUM

Key Information:

Vendor

WordPress
Status
Video Gallery – Youtube Gallery, Playlist & Video Grid
Vendor
CVE Published:
16 August 2026

What is CVE-2026-15790?

The YouTube Showcase plugin for WordPress is susceptible to a stored cross-site scripting vulnerability due to inadequate input sanitization and output escaping. This issue arises in versions up to and including 4.0.4, specifically through the 'emd_mb_meta' shortcode, where the raw post title of attachments is utilized without proper escaping. Authenticated attackers with author-level access can exploit this vulnerability to inject arbitrary web scripts, which execute when a user visits the modified page, potentially compromising user data.

Affected Version(s)

Video Gallery – YouTube Gallery, Playlist & Video Grid 0 <= 4.0.4

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/youtube-showca...
https://plugins.trac.wordpress.org/browser/youtube-showca...

CVSS V3.1

Score:
6.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Wordfence PRISM
.