CVE-2026-2479: CWE-918 Server-Side Request Forgery (SSRF) in dfactory Responsive Lightbox & Gallery
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.
AI Analysis
Technical Summary
CVE-2026-2479 describes an SSRF vulnerability in the Responsive Lightbox & Gallery WordPress plugin versions up to 2.7.1. The flaw arises from improper hostname validation using strpos() for substring matching rather than strict host comparison within the ajax_upload_image() function. This allows authenticated attackers with Author-level privileges or above to induce the server to send crafted HTTP requests to arbitrary locations, potentially interacting with internal network services. The vulnerability is rated medium severity with a CVSS 3.1 base score of 5.0 (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N). No known exploits in the wild or patch links are currently documented.
Potential Impact
An attacker with Author-level or higher privileges on a vulnerable WordPress site can exploit this SSRF vulnerability to make the server send arbitrary HTTP requests to internal or external systems. This could lead to unauthorized querying or modification of internal services accessible from the server. The confidentiality impact is limited (partial information disclosure), with no direct integrity or availability impact reported. The vulnerability requires authenticated access, limiting its exposure.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict Author-level access to trusted users only and monitor for suspicious activity related to the ajax_upload_image() function. Consider disabling or removing the Responsive Lightbox & Gallery plugin if it is not essential. Follow vendor updates closely for an official patch or temporary workaround.
CVE-2026-2479: CWE-918 Server-Side Request Forgery (SSRF) in dfactory Responsive Lightbox & Gallery
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-2479 describes an SSRF vulnerability in the Responsive Lightbox & Gallery WordPress plugin versions up to 2.7.1. The flaw arises from improper hostname validation using strpos() for substring matching rather than strict host comparison within the ajax_upload_image() function. This allows authenticated attackers with Author-level privileges or above to induce the server to send crafted HTTP requests to arbitrary locations, potentially interacting with internal network services. The vulnerability is rated medium severity with a CVSS 3.1 base score of 5.0 (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N). No known exploits in the wild or patch links are currently documented.
Potential Impact
An attacker with Author-level or higher privileges on a vulnerable WordPress site can exploit this SSRF vulnerability to make the server send arbitrary HTTP requests to internal or external systems. This could lead to unauthorized querying or modification of internal services accessible from the server. The confidentiality impact is limited (partial information disclosure), with no direct integrity or availability impact reported. The vulnerability requires authenticated access, limiting its exposure.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict Author-level access to trusted users only and monitor for suspicious activity related to the ajax_upload_image() function. Consider disabling or removing the Responsive Lightbox & Gallery plugin if it is not essential. Follow vendor updates closely for an official patch or temporary workaround.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-02-13T18:12:22.873Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 699eb5bab7ef31ef0bee126e
Added to database: 2/25/2026, 8:41:30 AM
Last enriched: 4/9/2026, 6:41:47 PM
Last updated: 4/11/2026, 12:52:05 PM
Views: 68
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