What’s Vulnerable › Vulnerabilities

CVE-2025-57539

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-09-09 · updated 2026-06-17
• Weakness: CWE-79

Description

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: 8.4

References

• https://forum.proxmox.com/threads/proxmox-virtual-environment-security-advisories.149331/page-2#post-792010
• https://github.com/khankishiyev-j/bug-bounty/blob/main/proxmox-xss
• https://www.youtube.com/watch?v=-wvkN-7oT5U
• https://github.com/khankishiyev-j/bug-bounty/blob/main/proxmox-xss

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