CVE-2026-15790

Video Gallery <= 4.0.4 - Authenticated (Author+) Stored Cross-Site Scripting via Attachment 'post_title' via emd_mb_meta Shortcode

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.

We have discovered 1,397 live websites that are affected by CVE-2026-15790.

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Affected Software

Product  Youtube Showcase
Category Wordpress Plugins
Vulnerable Domains1,397 live websites (100% of Youtube Showcase install base)
Vulnerable Versions
  • from 0 through 4.0.4
Vulnerable Versions Count36 versions ( 100% of all versions)


Common Weakness Enumeration

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')



Details

  • Published - Aug 16, 2026
  • Updated - Aug 17, 2026

Credits

  • Wordfence PRISM (finder)

Website Distribution by Country

Number of websites using CVE-2026-15790
United States511 websites


Germany118 websites
Italy86 websites
France71 websites
GB45 websites
Netherlands44 websites
Spain40 websites
India33 websites
Russia31 websites
Japan30 websites

Website Distribution by TLD

Number of websites using CVE-2026-15790
.com638 websites
.org122 websites
.it58 websites
.de44 websites
.net42 websites
.nl36 websites
.ru27 websites
.pl21 websites
.fr20 websites
.co.uk18 websites

Vulnerable Versions

Vulnerable versions are highlighted in red

Websites affected by CVE-2026-15790

Top websites that are affected by CVE-2026-15790. Please click on the "Contact us" link to get more information.
DomainCountryRankContacts
******.cz Czech Republic**,***
*************.com United States**,***
*************.**********.com United States***,***
*************.bb Barbados***,***
***************************.com United States***,***
***.***.nz New Zealand***,***
*********************.com United States***,***
**********.com United States***,***
***************.***.uk GB***,***
*****.com Germany***,***
See full domain list

FAQ

CVE-2026-15790 is Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Youtube Showcase
A total of 1,397 websites have been identified as vulnerable to CVE-2026-15790, based on global website indexing conducted by WebTechSurvey.
The Youtube Showcase is affected by the CVE-2026-15790 vulnerability.
Youtube Showcase versions up to and including 4.0.4 are vulnerable to CVE-2026-15790.