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5.4
MEDIUM CVSS 3.1
CVE-2025-57539
Proxmox Virtual Environment (PVE) Stored XSS Vulnerability
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.

INFO

Published Date :

Sept. 9, 2025, 5:16 p.m.

Last Modified :

Sept. 18, 2025, 5:41 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2025-57539 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Proxmox virtual_environment
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM 134c704f-9b21-4f2e-91b3-4a467353bcc0
Solution
Apply the vendor patch to sanitize the U2F Origin field and prevent XSS attacks.
  • Update Proxmox Virtual Environment to the latest version.
  • Apply vendor-provided security patches.
  • Sanitize all user-supplied input.
  • Validate the U2F Origin field.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-57539.

URL Resource
https://forum.proxmox.com/threads/proxmox-virtual-environment-security-advisories.149331/page-2#post-792010 Vendor Advisory Issue Tracking
https://github.com/khankishiyev-j/bug-bounty/blob/main/proxmox-xss Exploit Third Party Advisory
https://www.youtube.com/watch?v=-wvkN-7oT5U Broken Link
https://github.com/khankishiyev-j/bug-bounty/blob/main/proxmox-xss Exploit Third Party Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-57539 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-57539 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-57539 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-57539 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Sep. 18, 2025

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:a:proxmox:virtual_environment:8.4:*:*:*:*:*:*:*
    Added Reference Type MITRE: https://forum.proxmox.com/threads/proxmox-virtual-environment-security-advisories.149331/page-2#post-792010 Types: Issue Tracking, Vendor Advisory
    Added Reference Type CISA-ADP: https://github.com/khankishiyev-j/bug-bounty/blob/main/proxmox-xss Types: Exploit, Third Party Advisory
    Added Reference Type MITRE: https://github.com/khankishiyev-j/bug-bounty/blob/main/proxmox-xss Types: Exploit, Third Party Advisory
    Added Reference Type MITRE: https://www.youtube.com/watch?v=-wvkN-7oT5U Types: Broken Link
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Sep. 10, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
    Added CWE CWE-79
    Added Reference https://github.com/khankishiyev-j/bug-bounty/blob/main/proxmox-xss
  • New CVE Received by [email protected]

    Sep. 09, 2025

    Action Type Old Value New Value
    Added 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.
    Added Reference https://forum.proxmox.com/threads/proxmox-virtual-environment-security-advisories.149331/page-2#post-792010
    Added Reference https://github.com/khankishiyev-j/bug-bounty/blob/main/proxmox-xss
    Added Reference https://www.youtube.com/watch?v=-wvkN-7oT5U
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 5.4
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact