XSS in Proxmox Virtual Environment
CVE-2025-57538
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (24.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 24.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Proxmox Virtual Environment — versions 8.4
Weakness classification (CWE)
References
- github.com/khankishiyev-j/bug-bounty/blob/main/proxmox-xss (Exploit, Third Party Advisory)
- www.youtube.com/watch (Broken Link)
- forum.proxmox.com/threads/proxmox-virtual-environment-security-advisories.14933… (Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-57538?
- CVE-2025-57538 is a medium-severity vulnerability in Proxmox Virtual Environment, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-09-09.
- How severe is CVE-2025-57538?
- Medium severity. CVSS v3 base score is 5.4 out of 10.