Vulnerability DatabaseCVE-2025-53512

CVE-2025-53512:
vulnerability analysis and mitigation

Overview

The vulnerability (CVE-2025-53512) affects the Juju controller's /log endpoint, which was discovered on July 8, 2025. The security flaw exists in the authorization mechanism where the endpoint lacked sufficient authorization checks, potentially exposing sensitive debug messages to unauthorized users. This vulnerability affects Juju versions <2.9.52 and <3.6.8 (GitHub Advisory).

Technical details

The vulnerability exists in the /log endpoint, which is accessible via two paths: wss:///log and wss:///model//log. The issue stems from improper authorization implementation where the endpoint only verifies user authentication without performing specific permission checks. The vulnerability has been assigned a CVSS v3.1 base score of 6.5 (Medium) with the vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N. The weakness is categorized under CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) and CWE-285 (Improper Authorization) (NVD, GitHub Advisory).

Impact

Any user with a Juju account on a controller can access debug log messages from the /log endpoint without requiring specific permissions. The only requirement is for the user to exist in the controller user database. The exposed log messages may contain sensitive information that could be leveraged by attackers (GitHub Advisory).

Mitigation and workarounds

The vulnerability has been patched in Juju versions 2.9.52 and 3.6.8. No workarounds are available for unpatched systems. Users are advised to upgrade to the patched versions to mitigate this security risk (GitHub Advisory).