What’s Vulnerable › Vulnerabilities
CVE-2026-15790: Video Gallery <= 4.0.4 - Authenticated (Author+) Stored Cross-Site Scripting via Attachment 'post_title' via emd_mb_meta Shortcode
- Severity: medium (CVSS 6.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-16 · updated 2026-08-20
- Weakness: CWE-79
Description
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.
Affected products
References
- https://plugins.trac.wordpress.org/browser/youtube-showcase/tags/4.0.4/assets/ext/emd-meta-box/inc/helpers.php#L274
- https://plugins.trac.wordpress.org/browser/youtube-showcase/tags/4.0.4/assets/ext/emd-meta-box/inc/helpers.php#L72
- https://www.wordfence.com/threat-intel/vulnerabilities/id/3be5e544-1ea5-46f6-a15b-99b0e3718c91?source=cve
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