CVE-2025-12359: Dfactory Responsive Lightbox & Gallery

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

The Responsive Lightbox & Gallery plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 2.5.3 via the 'get_image_size_by_url' function. This is due to insufficient validation of user-supplied URLs when determining image dimensions for gallery items. This makes it possible for authenticated attackers, with Author-level access and above, to make web requests to arbitrary locations originating from the web application which can be used to query and modify information from internal services.

Affected products

• Dfactory Responsive Lightbox & Gallery: up to and including 2.5.3

Published 2025-11-19. Last modified 2026-06-17.