Medium severity · published Sep 9, 2025
CVE-2025-57539
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…
5.4
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VE
Virtual Environment · Proxmox
8.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-57539
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-57539
Issue Tracking
https://forum.proxmox.com/threads/proxmox-virtual-environment-security-advisories.149331/page-2#post-792010
Exploit
https://github.com/khankishiyev-j/bug-bounty/blob/main/proxmox-xss
Broken Link
https://www.youtube.com/watch?v=-wvkN-7oT5U
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