# CVE-2025-57538: CVE-2025-57538

Status: published. Published: 2025-09-09. Updated: 2026-11-08.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- proxmox / virtual_environment: 8.4 (affected, custom). Source: NVD

## NVD configuration conditions

Affected CPE matches depend on the following AND/OR and negation conditions:

```json
[
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:proxmox:virtual_environment:8.4:*:*:*:*:*:*:*",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "OR"
  }
]
```

## Severity and prioritization

- 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; source: NVD: 134c704f-9b21-4f2e-91b3-4a467353bcc0

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation poc; automatable no; technical impact partial; source NVD SSVC: 134c704f-9b21-4f2e-91b3-4a467353bcc0

- Weaknesses: CWE-79

## Exploit evidence

- exploit: https://github.com/khankishiyev-j/bug-bounty/blob/main/proxmox-xss (cve@mitre.org)
- exploit: https://github.com/khankishiyev-j/bug-bounty/blob/main/proxmox-xss (134c704f-9b21-4f2e-91b3-4a467353bcc0)

## References

- https://forum.proxmox.com/threads/proxmox-virtual-environment-security-advisories.149331/page-2#post-792010 (cve@mitre.org; Issue Tracking, Vendor Advisory)

- https://github.com/khankishiyev-j/bug-bounty/blob/main/proxmox-xss (cve@mitre.org; Exploit, Third Party Advisory)

- https://www.youtube.com/watch?v=mN-0Zia1LZw (cve@mitre.org; Broken Link)

- https://github.com/khankishiyev-j/bug-bounty/blob/main/proxmox-xss (134c704f-9b21-4f2e-91b3-4a467353bcc0; Exploit, Third Party Advisory)

## Provenance

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-57538; retrieved 2026-11-08; source updated 2026-11-08

Revision: 64bc76c34b6c2e91672b28e41d131d1c42d305b6cfa09938d439fcbbd38a9542

Canonical: https://y2.dev/cve/CVE-2025-57538

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.