CVE-2025-3662: Colorlib Fancybox

Medium severity, CVSS 6.1. EPSS: 0.2% chance of exploitation in the next 30 days.

The FancyBox for WordPress plugin before 3.3.6 does not escape captions and titles attributes before using them to populate galleries' caption fields. The issue was received as a Contributor+ Stored XSS, however one of our researcher (Marc Montpas) escalated it to an Unauthenticated Stored XSS

Affected products

• Colorlib Fancybox: before 3.3.6 (fixed in 3.3.6)

Published 2025-06-03. Last modified 2026-06-17.