CVE-2024-39646 is a cross-site scripting vulnerability in the Kunal Custom 404 Pro WordPress plugin (versions up to 3.11.1). It results from improper input neutralization during web page generation, allowing attackers to inject and execute arbitrary scripts via crafted input. The vulnerability has a CVSS 3.1 base score of 7.1, indicating high severity with network attack vector, low attack complexity, no privileges required, user interaction required, scope changed, and impacts on confidentiality, integrity, and availability. No patch or remediation details are currently provided by the vendor or in the advisory data.

Successful exploitation of this vulnerability could allow attackers to execute arbitrary scripts in the context of users visiting affected web pages, potentially leading to information disclosure, session hijacking, or other malicious actions impacting confidentiality, integrity, and availability. The CVSS score of 7.1 reflects a high severity risk. No known exploits are reported in the wild at this time.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider disabling or limiting use of the affected plugin to reduce exposure. Monitor for updates from the vendor and apply patches promptly once available.