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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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Responsive Lightbox Plugin | — | Update responsive-lightbox plugin to version 2.5.4, or a newer patched version | Nov 19, 2025 | Nov 18, 2025 |
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