CVE-2025-13698

Published: Dec 23, 2025Modified: Jun 17, 2026Deferred

4.5

Vector

CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

Exploitability: 0.9 / Impact: 3.6

Source: zdi-disclosures@trendmicro.com (Secondary)

Description

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.

Related CWEs

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

References (2)

https://github.com/opnsense/core/commit/cb15c935137d05c86a1e6cf12af877e9c32a23af

Source: zdi-disclosures@trendmicro.com

https://www.zerodayinitiative.com/advisories/ZDI-25-1022/

Source: zdi-disclosures@trendmicro.com

Timeline

No history available yet.