Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Umbraco | Umbraco Cms | >= 10.0.0, < 13.12.1 |
Related Weaknesses (CWE)
References
- https://github.com/umbraco/Umbraco-CMS/commit/7505efd433189037f46547932d4a8b603fPatch
- https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-hfv2-pf68-m33xPatchThird Party Advisory
FAQ
What is CVE-2025-66625?
CVE-2025-66625 is a vulnerability with a CVSS score of 4.9 (MEDIUM). 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...
How severe is CVE-2025-66625?
CVE-2025-66625 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-66625?
Check the references section above for vendor advisories and patch information. Affected products include: Umbraco Umbraco Cms.