CVE-2026-65437 is an unauthenticated Cross-Site Scripting (CWE-79) vulnerability affecting CleanTalk Inc's Spam protection, AntiSpam, FireWall plugin for versions up to 6.82. The vulnerability arises from improper neutralization of input during web page generation, enabling attackers to inject malicious scripts that can execute in the context of users' browsers. The CVSS 3.1 vector indicates the attack can be performed remotely over the network with low complexity and no privileges, but requires user interaction. The vulnerability impacts confidentiality, integrity, and availability to a limited extent. No vendor advisory or patch information is currently available, and no exploits are known in the wild.

Successful exploitation of this vulnerability could allow an unauthenticated attacker to execute arbitrary scripts in the context of users visiting affected web pages. This may lead to limited confidentiality loss, integrity compromise, and availability impact as indicated by the CVSS vector. The attack requires user interaction but no authentication or privileges. 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, users should consider applying any available workarounds from the vendor or limit exposure by restricting access to affected plugin features. Monitor vendor communications for updates on patches or mitigations.