CVE-2026-2479: Dfactory Responsive Lightbox & Gallery

Medium severity, CVSS 5.0. 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, 2.7.1. This is due to the use of `strpos()` for substring-based hostname validation instead of strict host comparison in the `ajax_upload_image()` function. 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 2.7.1

Published 2026-02-25. Last modified 2026-06-17.