CVE-2026-39799: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Joomunited WP File Download

This vulnerability, identified as CWE-79, involves improper neutralization of input during web page generation in the WP File Download plugin by Joomunited. It affects all versions up to 6.3.6 and can be exploited remotely without authentication. The CVSS 3.1 score of 7.1 reflects its high severity, with network attack vector, low attack complexity, no privileges required, user interaction required, and scope changed. The impact includes partial loss of confidentiality, integrity, and availability.

Successful exploitation can lead to execution of arbitrary scripts in the context of the affected web application, potentially allowing attackers to steal sensitive information, manipulate content, or disrupt service. The vulnerability affects confidentiality, integrity, and availability to a limited extent as indicated by the CVSS vector.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should monitor vendor communications for updates. Until a fix is available, consider applying temporary mitigations such as input validation or disabling the vulnerable functionality if feasible.