CVE-2026-13378 is a stored Cross-Site Scripting vulnerability in the Form Vibes plugin for WordPress (versions <=1.5.2). The flaw exists due to improper neutralization of input during web page generation, specifically insufficient sanitization and escaping of Contact Form 7 form fields. This allows unauthenticated attackers to inject arbitrary web scripts that execute in the context of users viewing the injected pages, potentially leading to session hijacking, defacement, or other script-based attacks. The vulnerability is classified under CWE-79 and has a CVSS v3.1 base score of 7.2, indicating high severity. There is no vendor advisory or patch currently available, and no known exploits in the wild have been reported.

Successful exploitation allows unauthenticated attackers to inject and execute arbitrary scripts in the context of users accessing the affected pages. This can lead to information disclosure, session hijacking, or other client-side attacks. The vulnerability affects confidentiality and integrity but does not impact availability. The CVSS vector indicates network attack vector, low attack complexity, no privileges or user interaction required, and scope change.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider restricting access to the affected plugin's functionality or disabling the plugin if feasible. Monitor for updates from the vendor and apply patches promptly once released.