CVE-2026-13605: Unknown Photoswipe

Medium severity, CVSS 6.8. EPSS: 0.4% chance of exploitation in the next 30 days.

The PhotoSwipe WordPress plugin through 4.1.1.1 uses the title attribute of author-supplied link markup as a lightbox caption that is written into the page DOM without escaping. Because the title attribute survives the post-content sanitization applied to users who lack the unfiltered_html capability, an authenticated user with Author-level access can store a JavaScript payload that executes in the browser of any visitor, including an administrator, who clicks the link.

Affected products

• Unknown Photoswipe: up to and including 4.1.1.1

Published 2026-07-29. Last modified 2026-07-30.