How severe is CVE-2025-34173?

CVE-2025-34173 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2025-34173 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-34173?

CVE-2025-34173 affects Pfsense. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-34173?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-34173 have an EU (EUVD) identifier?

Yes. CVE-2025-34173 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27472.

When was CVE-2025-34173 published?

CVE-2025-34173 was published on 2025-09-09 and last updated on 2026-06-17.

CVE-2025-34173

CVE-2025-34173 is a medium-severity vulnerability in Pfsense with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v4: 5.3
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-27472
Weakness: CWE-22
Affected product: Pfsense
Published: 2025-09-09
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-34173?: 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.
How severe is CVE-2025-34173?: CVE-2025-34173 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2025-34173 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-34173?: CVE-2025-34173 affects Pfsense. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-34173?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-34173 have an EU (EUVD) identifier?: Yes. CVE-2025-34173 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27472.
When was CVE-2025-34173 published?: CVE-2025-34173 was published on 2025-09-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:pfsense:pfsense:*:*:*:*:community:*:*:*

More vulnerabilities in Pfsense

CVE-2025-69691 — Critical (CVSS 9.9): Netgate pfSense CE 2.8.0 allows code execution in the XMLRPC API via pfsense.exec_php. NOTE: the Supplier disputes this…
CVE-2023-29974 — Critical (CVSS 9.8): An issue discovered in Pfsense CE version 2.6.0 allows attackers to compromise user accounts via weak password…
CVE-2023-27100 — Critical (CVSS 9.8): Improper restriction of excessive authentication attempts in the SSHGuard component of Netgate pfSense Plus software…
CVE-2025-69690 — Critical (CVSS 9.1): Netgate pfSense CE 2.7.2 allows code execution by using the module installer with a backup file with a serialized PHP…
CVE-2021-41282 — High (CVSS 8.8): diag_routes.php in pfSense 2.5.2 allows sed data injection. Authenticated users are intended to be able to view data…
CVE-2016-10709 — High (CVSS 8.8): pfSense before 2.3 allows remote authenticated users to execute arbitrary OS commands via a '|' character in the…

All CVEs affecting Pfsense →

Other CWE-22 (Path Traversal) vulnerabilities

CVE-2026-48282 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Limitation of a Pathname to a Restricted…
CVE-2026-54917 — Critical (CVSS 10.0): SeaweedFS is a distributed storage system for object storage (S3), file systems, and Iceberg tables. Prior to 4.30, the…
CVE-2026-11429 — Critical (CVSS 10.0): Two endpoints in the Vault Service ScriptsController, shared by Altium Enterprise Server and Altium 365, accept file…
CVE-2026-34909 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit a Path Traversal vulnerability found in UniFi OS devices to…
CVE-2026-7411 — Critical (CVSS 10.0): In Eclipse BaSyx Java Server SDK versions prior to 2.0.0-milestone-10, inadequate path normalization in the Submodel…
CVE-2026-36767 — Critical (CVSS 10.0): A path traversal vulnerability in the /content/images/add endpoint of shopizer v3.2.5 allows attackers write arbitrary…

Browse all CWE-22 (Path Traversal) vulnerabilities →