This vulnerability (CWE-79) in Progress MOVEit Transfer's Ad Hoc module arises from improper input neutralization during web page generation, enabling cross-site scripting attacks. The affected versions are exactly 2026.0.0, 2025.1.0, and 2025.0.0. The CVSS 3.1 base score is 8.0, indicating high severity with network attack vector, low attack complexity, requiring low privileges and user interaction, and impacts confidentiality, integrity, and availability. No vendor advisory or patch is currently available, and no known exploits are reported in the wild.

Successful exploitation could allow an attacker to execute arbitrary scripts in the context of the affected web application, potentially leading to theft of sensitive information, session hijacking, or other malicious actions impacting confidentiality, integrity, and availability of the system.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should apply general best practices for mitigating XSS risks, such as restricting user privileges and avoiding interaction with untrusted content. Monitor vendor communications for updates on patches or official mitigations.