How severe is CVE-2025-57538?

CVE-2025-57538 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-57538 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-57538?

CVE-2025-57538 affects Proxmox Virtual Environment. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-57538?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-57538 have an EU (EUVD) identifier?

Yes. CVE-2025-57538 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27408.

When was CVE-2025-57538 published?

CVE-2025-57538 was published on 2025-09-09 and last updated on 2026-06-17.

CVE-2025-57538

CVE-2025-57538 is a medium-severity vulnerability in Proxmox Virtual Environment with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-27408
Weakness: CWE-79
Affected product: Proxmox Virtual Environment
Published: 2025-09-09
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2025-57538?: CVE-2025-57538 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-57538 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-57538?: CVE-2025-57538 affects Proxmox Virtual Environment. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-57538?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-57538 have an EU (EUVD) identifier?: Yes. CVE-2025-57538 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27408.
When was CVE-2025-57538 published?: CVE-2025-57538 was published on 2025-09-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:proxmox:virtual_environment:8.4:*:*:*:*:*:*:*

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