CVE-2025-5239 is a stored cross-site scripting vulnerability in the Domain For Sale – Sell Domains with Landing Pages, Offers & Inquiries WordPress plugin by themeatelier. The issue exists in the 'class_name' parameter due to improper neutralization of input during web page generation, allowing authenticated users with Contributor or higher privileges to inject arbitrary web scripts. These scripts execute in the context of any user accessing the injected page, potentially leading to session hijacking or other script-based attacks. The vulnerability affects all plugin versions up to and including 3.0.10. The CVSS 3.1 score is 6.4 (medium severity), with attack vector network, low attack complexity, privileges required, no user interaction, and impacts confidentiality and integrity with no availability impact.

An authenticated attacker with Contributor-level or higher access can exploit this vulnerability to inject malicious scripts that execute in the browsers of users visiting the affected pages. This can lead to unauthorized actions performed on behalf of users, theft of sensitive information, or other client-side attacks. The impact affects confidentiality and integrity but does not affect availability. There are no known exploits 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 available, restrict Contributor-level access to trusted users only and consider applying manual input sanitization or output escaping as a temporary mitigation. Monitor the vendor's channels for updates regarding an official patch or fix.