Responsive Lightbox & Gallery: Server-side request forgery
Responsive Lightbox & Gallery is affected by server-side request forgery. Exploitation requires at least author-level access. The vulnerable server can be induced to make attacker-selected network requests.
- Component
- Responsive Lightbox & Gallery
- Plugin slug
responsive-lightbox- Affected
- See vendor advisory
- Safe version
- See mitigation notes
- Published
- Feb 25, 2026
This CVE was published Feb 25, 2026 and is one of 11 known issues for this plugin.
Update, patch or deactivate.
Update Responsive Lightbox & Gallery to a release outside the affected range, or disable and remove it until a fixed version is available.
No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
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.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N