CVE-2025-34173 Netgate pfSense CE Snort package v4.1.6_25 Directory Traversal Information Disclosure

Medium 5.3 Published 9 Sep 2025 Updated 14 Jul 2026

Authenticated attackers can enumerate files on pfSense CE via directory traversal in the Snort package, revealing file existence without reading contents.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-34173?

CVE-2025-34173 is a medium-severity path traversal vulnerability in Netgate pfSense CE, published on 9 Sep 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

In pfSense CE /usr/local/www/snort/snort_ip_reputation.php, the value of the iplist parameter is not sanitized of directory traversal-related characters/strings before being used to check if a file exists. While the contents of the file cannot be read, the server reveals whether a file exists, which allows an attacker to enumerate files on the target. The attacker must be authenticated with at least "WebCfg - Services: Snort package" permissions.

Weakness: CWE-22

Which versions are affected by CVE-2025-34173?

It affects 1 product.

Products include Pfsense Pfsense.

How do I fix CVE-2025-34173?

No fix has been published for CVE-2025-34173 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2025-34173 being exploited?

There is no known exploitation of CVE-2025-34173 in the wild and no public exploit code.

Sources

Also known as GHSA-3cv5-r4jh-v4pj.