CVE-2025-57539: Proxmox Virtual Environment

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

A stored cross-site scripting (XSS) vulnerability in the U2F Origin field of the Datacenter configuration in Proxmox Virtual Environment (PVE) 8.4 allows authenticated users to store malicious input. The payload is rendered unsafely in the Web UI and executed when viewed by other users, potentially leading to session hijacking or other attacks.

Affected products

• Proxmox Virtual Environment: version 8.4 only

Published 2025-09-09. Last modified 2026-06-17.