The Visual Portfolio, Photo Gallery & Post Grid plugin for WordPress suffers from a stored cross-site scripting vulnerability (CWE-79) via the 'title_tag' parameter in versions up to 3.3.2. Authenticated attackers with author-level access or higher can inject arbitrary JavaScript code that executes in the context of users visiting the compromised pages. This occurs due to inadequate input sanitization and output escaping of the 'title_tag' parameter during page generation. The vulnerability is network exploitable with low attack complexity and no user interaction required beyond authentication. The CVSS 3.1 vector is AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N, reflecting partial confidentiality and integrity impact without availability impact.

An attacker with author-level or higher privileges can inject persistent malicious scripts into pages via the 'title_tag' parameter. These scripts execute in the browsers of users who view the infected pages, potentially leading to theft of sensitive information or session hijacking. The vulnerability affects confidentiality and integrity but does not impact availability. No known active exploitation has been reported.

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 consider removing or disabling the affected plugin if possible. Monitor for updates from the vendor and apply patches promptly once available.