CVE-2026-15790
MediumCVSS 6.4Exploitation Probability (EPSS)
Low risk10th percentile - higher than 10% of all known CVEs
Summary
The Youtube Showcase plugin for WordPress up to version 4.0.4 is vulnerable to Stored Cross-Site Scripting via the 'emd_mb_meta' shortcode. Attachment titles are interpolated into HTML attributes without proper escaping, allowing authenticated attackers with author-level access and above to inject arbitrary scripts.
Risk Assessment
Risk of user session hijacking, data theft, or malware distribution.
Recommendation
Update the Youtube Showcase plugin to the latest version. Restrict author permissions and regularly scan pages.
Original NVD description (English source)
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.