XSS in Ipfire
CVE-2025-34310
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 INC_SPD, OUT_SPD, DEFCLASS_INC, and DEFCLASS_OUT parameters when updating Quality of Service (QoS) settings. When a user updates speeds or classes, the application issues an HTTP POST request to /cgi-bin/qos.cgi and the values for incoming/outgoing speeds and default classes are provided in the INC_SPD, OUT_SPD, DEFCLASS_INC, and DEFCLASS_OUT parameters. 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 the affected QoS 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: 0.005 (39.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000
Affected products
- Ipfire — versions 2.29
- Ipfire.org Ipfire — versions 0
Weakness classification (CWE)
References
- www.ipfire.org/blog/ipfire-2-29-core-update-198-released (vendor-advisory, Release Notes, patch)
- bugzilla.ipfire.org/show_bug.cgi (issue-tracking, Third Party Advisory, Issue Tracking)
- www.vulncheck.com/advisories/ipfire-stored-xss-via-quality-of-service-settings (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2025-34310?
- CVE-2025-34310 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-2025-34310?
- Medium severity. CVSS v3 base score is 5.4 out of 10.