CVE-2026-15790 Cross-site scripting in Video Gallery – YouTube Gallery, Playlist & Video Grid
Authenticated attackers can inject arbitrary scripts via attachment titles in the Video Gallery plugin, leading to stored XSS execution on victim pages.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-15790?
CVE-2026-15790 is a medium-severity cross-site scripting vulnerability in emarket-design Video Gallery – YouTube Gallery, Playlist & Video Grid, published on 16 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-15790?
How do I fix CVE-2026-15790?
No fix has been published for CVE-2026-15790 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-15790 being exploited?
There is no known exploitation of CVE-2026-15790 in the wild and no public exploit code.
Sources
Also known as GHSA-mwqg-cv4p-5r7g.