CVE-2025-3774 is a stored cross-site scripting vulnerability in the Wise Chat plugin for WordPress, affecting all versions up to and including 3.3.4. The vulnerability is due to improper neutralization of input in the X-Forwarded-For header, which is not properly sanitized or escaped before being included in web pages. This allows unauthenticated attackers to inject arbitrary JavaScript code that executes in the context of users visiting the injected pages. The CVSS 3.1 base score is 7.2, reflecting network attack vector, low attack complexity, no privileges or user interaction required, and impacts on confidentiality and integrity with scope change.

Successful exploitation allows an unauthenticated attacker to execute arbitrary scripts in the browsers of users visiting the affected pages, potentially leading to theft of sensitive information, session hijacking, or other malicious actions performed with the privileges of the victim user. The vulnerability affects confidentiality and integrity but does not impact availability. No known exploits have been reported in the wild.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider disabling the Wise Chat plugin or restricting access to affected pages. Applying web application firewall (WAF) rules to filter or sanitize the X-Forwarded-For header may provide temporary mitigation. Monitor vendor channels for updates and apply patches promptly once released.