CVE-2025-66625
4.9
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Exploitability: 1.2 / Impact: 3.6
Source: security-advisories@github.com (Secondary)
Description
Umbraco is an ASP.NET CMS. Due to unsafe handling and deletion of temporary files in versions 10.0.0 through 13.12.0, during the dictionary upload process an attacker with access to the backoffice can trigger predictable requests to temporary file paths. The application’s error responses (HTTP 500 when a file exists, 404 when it does not) allow the attacker to enumerate the existence of arbitrary files on the server’s filesystem. This vulnerability does not allow reading or writing file contents. In certain configurations, incomplete clean-up of temporary upload files may additionally expose the NTLM hash of the Windows account running the Umbraco application. This issue is fixed in version 13.12.1.
Affected (1)
Products: Umbraco: Umbraco Cms
Configuration A
| Vulnerable Software | Affected Versions |
|---|---|
| From 10.0.0 to 13.12.1 |
Related CWEs
CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
CWE-377
Insecure Temporary File
Creating and using insecure temporary files can leave application and system data vulnerable to attack.
CWE-552
Files or Directories Accessible to External Parties
The product makes files or directories accessible to unauthorized actors, even though they should not be.
References (2)
Source: security-advisories@github.com
Patch
Source: security-advisories@github.com
PatchThird Party Advisory
Timeline
No history available yet.