Improper Authorization in Umbraco CMS

1) Improper Authorization

EUVDB-ID: #VU105962

Risk: Low

CVSSv4.0: 0.6 [CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-27602

CWE-ID: CWE-285 - Improper Authorization

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authorization checks.

The vulnerability exists due to improper API access control. A remote user can manipulate backoffice API URLs and retrieve or delete content or media.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Umbraco CMS: 10.8.0 - 13.7.0

CPE2.3

• cpe:2.3:a:umbraco:umbraco:10.8.8:*:*:*:*:*:*:*
• cpe:2.3:a:umbraco:umbraco:13.7.0:*:*:*:*:*:*:*

External links

https://github.com/umbraco/Umbraco-CMS/commit/5b54bed406682ceff57903bf7d3c57814eef31a7
https://github.com/umbraco/Umbraco-CMS/commit/7888b9a4ce5ae7f9bda7ff3bb705b8fcd2f1675d
https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-wx5h-wqfq-v698

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.