CVE-2025-34305

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.

PUBLISHED Reserved 2025-04-15 | Published 2025-10-28 | Updated 2025-10-29 | Assigner VulnCheck

Problem types

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

Product status

Credits

Alex Williams from Pellera Technologies finder

References

www.ipfire.org/blog/ipfire-2-29-core-update-198-released vendor-advisory patch

bugzilla.ipfire.org/show_bug.cgi?id=13880 issue-tracking

www.vulncheck.com/...d-xss-via-multiple-methods-in-cleanhtml third-party-advisory

cve.org (CVE-2025-34305)

nvd.nist.gov (CVE-2025-34305)

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