CVE-2025-3510 is a stored cross-site scripting vulnerability in the tagDiv Composer plugin for WordPress, affecting all versions up to 5.4. The issue is due to improper neutralization of input during web page generation, specifically insufficient input sanitization and output escaping of user-supplied attributes in multiple shortcodes. This allows authenticated attackers with contributor-level privileges or higher to inject arbitrary JavaScript code that executes in the context of users visiting the compromised pages. The vulnerability has a CVSS 3.1 base score of 6.4, reflecting a medium severity with network attack vector, low attack complexity, and no user interaction required.

An attacker with contributor-level access or higher can exploit this vulnerability to inject malicious scripts into pages generated by the tagDiv Composer plugin. These scripts execute in the browsers of users who view the affected pages, potentially leading to theft of user credentials, session hijacking, or other client-side attacks. The vulnerability does not impact availability but can compromise confidentiality and integrity of user data within the affected WordPress site.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict contributor-level access to trusted users only, and consider disabling or limiting use of the tagDiv Composer plugin shortcodes that accept user input. Monitor vendor channels for updates and apply patches promptly once available.