Path Traversal in Deciso Opnsense
CVE-2025-13698
Deciso OPNsense diag_backup.php filename Directory Traversal Arbitrary File Creation Vulnerability. This vulnerability allows network-adjacent attackers to create arbitrary files on affected installations of Deciso OPNsense. Authentication is required to exploit this vulnerability. The specific flaw exists within the handling of backup configuration files. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to create files in the context of root. Was ZDI-CAN-28133.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.5 (Medium). Vector: CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.006 (47.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: -0.000
Affected products
- Deciso Opnsense — versions 25.7
Weakness classification (CWE)
References
- www.zerodayinitiative.com/advisories/ZDI-25-1022/ (x_research-advisory)
- github.com/opnsense/core/commit/cb15c935137d05c86a1e6cf12af877e9c32a23af (vendor-advisory)
Frequently asked questions
- What is CVE-2025-13698?
- CVE-2025-13698 is a medium-severity vulnerability in Deciso Opnsense, classified under Path Traversal. CVSS score: 4.5/10. Published 2025-12-23.
- How severe is CVE-2025-13698?
- Medium severity. CVSS v3 base score is 4.5 out of 10.