CVE-2025-57538

5.4 mediumEPSS 0.3%

Medium (5.4) in proxmox virtual environment. EPSS 0.3% chance of exploitation in the next 30 days.

A stored cross-site scripting (XSS) vulnerability in the HTTP Proxy field within the Datacenter configuration panel of Proxmox Virtual Environment (PVE) 8.4 allows an authenticated user to inject malicious input. The input is stored and executed in the context of other users' browsers when they view the affected configuration page. This can lead to arbitrary JavaScript execution.

Severity

CVSS 3.1

5.4 medium

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

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 27% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2025-09-09
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

proxmox:virtual_environment

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=mN-0Zia1LZw
https://github.com/khankishiyev-j/bug-bounty/blob/main/proxmox-xss

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