anonhaven

CVE-2026-15790

MEDIUM CVSS 3.1: 6.4 EPSS 0.19%
Updated Aug 20, 2026
Emarket-Design
Parameter Value
CVSS 6.4 (MEDIUM)
Type CWE-79 (Cross-Site Scripting (XSS))
Vendor Emarket-Design
Public PoC No

The Youtube Showcase plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 4.0.4 via the 'emd_mb_meta' shortcode. This is due to insufficient input sanitization and output escaping on attachment titles referenced by the shortcode's image field: EMD_MB_Helper::image_info() returns the attachment's raw post_title, and EMD_MB_Helper::shortcode() interpolates it into title="%s" HTML attributes via sprintf() without esc_attr(). This makes it possible for authenticated attackers, with author-level access and above (upload_files capability required to create the attachment, edit_posts/publish_posts to embed the shortcode), to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption

CVSS Vector v3.1

Weakness Type (CWE)

CWE-79 Cross-Site Scripting (XSS)

Vulnerable Products

emarket-design:video gallery – youtube gallery, playlist & video grid

References 3

https://www.wordfence.com/threat-intel/vulnerabilities/id/3be5e544-1ea5-46f6-a1…
NVD
https://plugins.trac.wordpress.org/browser/youtube-showcase/tags/4.0.4/assets/e…
NVD
https://plugins.trac.wordpress.org/browser/youtube-showcase/tags/4.0.4/assets/e…
NVD
Share Post Share Share Share