CVE-2025-57540

A stored cross-site scripting (XSS) vulnerability exists in the WebAuthn Relying Party field within the Datacenter configuration of Proxmox Virtual Environment (PVE) 8.4. Authenticated users can inject JavaScript code that is later executed in the browsers of users who view the configuration page, enabling client-side attacks.

CVSS v3.1 CNA

5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS

0.29% chance of exploitation in the next 30 days, 20th percentile

Published

2025-09-09

Updated

2025-09-10

Proof-of-concept exploits (1)

• khankishiyev-j/bug-bounty/blob/main/proxmox-xss0★ · 2025-08-07

Security advisories

• https://forum.proxmox.com/threads/proxmox-virtual-environment-security-advisories.149331/…

References

• CVE Record
• NVD entry

Related

• CVE-2025-57538
• CVE-2025-57539