CVE-2025-34312: IPFire < v2.29 Command Injection via URL Filter Blacklist

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-10-28 · updated 2026-09-26
Weakness: CWE-78

Description

IPFire versions prior to 2.29 (Core Update 198) contain a command injection vulnerability that allows an authenticated attacker to execute arbitrary commands as the 'nobody' user via the BE_NAME parameter when installing a blacklist. When a blacklist is installed the application issues an HTTP POST to /cgi-bin/urlfilter.cgi and interpolates the value of BE_NAME directly into a shell invocation without appropriate sanitation. Crafted input can inject shell metacharacters, leading to arbitrary command execution in the context of the 'nobody' user.

Affected products

IPFire.org IPFire: before 2.29; 2.29-core_update183, 2.29-core_update184, 2.29-core_update185, 2.29-core_update186, 2.29-core_update187, 2.29-core_update188 (+9) — fixed in 2.29

How to fix

Upgrade to a fixed version: IPFire.org IPFire 2.29. Check the vendor advisory for mitigations.

References

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