CVE-2025-34305

IPFire < v2.29 Stored XSS via Multiple Methods in cleanhtml()

State: Published
Severity: 5.1 Medium
Published: Oct 28, 2025
Updated: Oct 29, 2025
Reserved: Apr 15, 2025

Description

IPFire versions prior to 2.29 (Core Update 198) contain multiple stored cross-site scripting (XSS) vulnerabilities caused by a bug in the cleanhtml() function (/var/ipfire/header.pl) that fails to apply HTML-entity encoding to user input. When an authenticated user submits data to affected endpoints - for example, POST /cgi-bin/wakeonlan.cgi (CLIENT_COMMENT), /cgi-bin/dhcp.cgi (ADVOPT_DATA, FIX_REMARK, FIX_FILENAME, FIX_ROOTPATH), /cgi-bin/connscheduler.cgi (ACTION_COMMENT), /cgi-bin/dnsforward.cgi (REMARK), /cgi-bin/vpnmain.cgi (REMARK), or /cgi-bin/dns.cgi (REMARK) - the application calls escape() and HTML::Entities::encode_entities() but never assigns the sanitized result back to the output variable. The original unsanitized value is therefore 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 entries.

Scores

CVSS	Score	Vector	Source
4.0	5.1 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N	VulnCheck

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

Affected Products

Product	Versions
IPFireIPFire.org	before 2.29 (Core Update 198)Affected

References

https://www.ipfire.org/blog/ipfire-2-29-core-update-198-releasedvendor-advisorypatch
https://bugzilla.ipfire.org/show_bug.cgi?id=13880issue-tracking
https://www.vulncheck.com/advisories/ipfire-stored-xss-via-multiple-methods-in-cleanhtmlthird-party-advisory

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