What is CVE-2025-50976?

CVE-2025-50976 is a medium-severity vulnerability in Ipfire, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-08-26.

How severe is CVE-2025-50976?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2025-50976 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Ipfire

CVE-2025-50976

IPFire 2.29 DNS management interface (dns.cgi) fails to properly sanitize user-supplied input in the NAMESERVER, REMARK, and TLS_HOSTNAME query parameters, resulting in a reflected cross-site scripting (XSS) vulnerability.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2025-08-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (12.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 12.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Ipfire — versions 2.29

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

github.com/4rdr/proofs/blob/main/info/IPFire-2.29-Reflected-XSS-via-DNS.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-50976?: CVE-2025-50976 is a medium-severity vulnerability in Ipfire, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-08-26.
How severe is CVE-2025-50976?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2025-50976 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.