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CVE-2025-57539

20
FAUCET Score

CVE-2025-57539 is a stored cross-site scripting (XSS) vulnerability affecting Proxmox Virtual Environment (PVE) 8.4, specifically within the U2F Origin field of the Datacenter configuration. Authenticated users can inject malicious scripts that are then executed in the Web UI for other users, potentially leading to session hijacking or other client-side attacks. Rated with a CVSS score of 5.4 (Medium), this vulnerability has a network attack vector and low attack complexity, but requires user interaction and prior authentication. The potential impact involves low confidentiality and integrity compromise, with no availability impact. Currently, there is no evidence of active exploitation, nor are there publicly available exploit modules in Metasploit, Nuclei, or ExploitDB. Community discussion and media coverage for this CVE are minimal, indicating a low level of public attention at this time.

Impacted Technologies

VendorProductVersion(s)CPE
8.4CPE matchmatch criteria
cpe:2.3:a:proxmox:virtual_environment:8.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.4MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.3
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.27%
Probability of exploitation in next 30 days
EPSS Percentile
18.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0027 is in the 25th percentile among its peer group of 15,225 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

forum.proxmox.com / threads/proxmox-virtual-environment-security-advisories.149331/page-2
Issue TrackingVendor Advisory
github.com / khankishiyev-j/bug-bounty/blob/main/proxmox-xss
ExploitThird Party Advisory
youtube.com / watch
Broken Link