The FooGallery WordPress plugin versions up to 2.4.31 suffer from a stored cross-site scripting vulnerability (CWE-79) due to improper neutralization of input in the data-caption-title and data-caption-description HTML attributes. This allows authenticated users with Contributor or higher privileges to inject arbitrary JavaScript code that executes in the context of other users viewing the injected pages. The vulnerability is network exploitable with low attack complexity and does not require user interaction. It impacts confidentiality and integrity but not availability.

Successful exploitation allows an attacker with Contributor-level access or higher to inject persistent malicious scripts into pages generated by the plugin. These scripts execute in the browsers of users who view the compromised pages, potentially leading to theft of sensitive information or session hijacking. The vulnerability does not affect availability. There are no reports of active exploitation in the wild.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict Contributor-level access to trusted users only and consider disabling or limiting use of the affected plugin. Monitor official FooGallery and WordPress security advisories for updates regarding patches or mitigations.