CVE-2025-3516: 
WordPress vulnerability analysis and mitigation

CVE-2025-3516 is a stored Cross-Site Scripting (XSS) vulnerability affecting the Simple Lightbox WordPress plugin versions before 2.9.4. The vulnerability was discovered by Pierre Rudloff and publicly disclosed on April 25, 2025. The issue affects WordPress installations with the Simple Lightbox plugin installed, specifically impacting users with contributor roles and above (WPScan, NVD).

The vulnerability stems from the plugin's failure to properly validate and escape certain attributes before outputting them back in a page or post. This security flaw has been assigned a CVSS v3.1 score of 5.9 (Medium) with the vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L. The vulnerability is classified under CWE-79 (Cross-Site Scripting) (WPScan).

The vulnerability allows users with contributor privileges or higher to perform Stored Cross-Site Scripting attacks. When exploited, malicious JavaScript code can be executed in the context of other users' browsers when they view the affected page or post (WPScan).

The vulnerability has been patched in version 2.9.4 of the Simple Lightbox plugin. Users are advised to update to this version or later to mitigate the security risk (WPScan).