XSS in Ipfire

CVE-2025-34309

IPFire versions prior to 2.29 (Core Update 198) contain a stored cross-site scripting (XSS) vulnerability that allows an authenticated attacker to inject arbitrary JavaScript code through the SERVICE, LOGIN, and PASSWORD parameters when creating or editing a Dynamic DNS host. When a new Dynamic DNS host is added, the application issues an HTTP POST request to /cgi-bin/ddns.cgi and saves the values of the LOGIN, PASSWORD, and SERVICE parameters. The SERVICE value is displayed after the host entry is created, and the LOGIN and PASSWORD values are displayed when that host entry is edited. The values of these parameters are stored and later rendered in the web interface without proper sanitation or encoding, allowing injected scripts to execute in the context of other users who view or edit the affected Dynamic DNS entries.

Vulnerability class: XSS (Cross-Site Scripting)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.053 (92.3th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 92.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-34309: held from 0.050 to 0.053.

EPSS over last 30 days · oldest: 0.050 · newest: 0.053 · change: +0.003

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-34309?
CVE-2025-34309 is a medium-severity vulnerability in Ipfire, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-10-28.
How severe is CVE-2025-34309?
Medium severity. CVSS v3 base score is 5.4 out of 10.