CVE-2026-107323

The Gallery PhotoBlocks WordPress plugin before 1.3.6 does not sanitize and escape one of its gallery settings before outputting it into an HTML attribute, allowing users with Contributor-level access and above to store JavaScript that executes in the browser of anyone who views a page containing the gallery, including administrators.

An attacker can execute malicious script in an administrator's browser, potentially leading to session hijacking, data theft, or further site compromise.

Update the Gallery PhotoBlocks plugin to version 1.3.6 or later, which includes the security fix.