#VU108681 Observable Response Discrepancy in Umbraco CMS - CVE-2025-46736

Vulnerability identifier: #VU108681

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-46736

CWE-ID: CWE-204

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Umbraco CMS
Web applications / CMS

Vendor: Umbraco

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to the observable response discrepancy issue. A remote attacker can determine whether an account exists.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Umbraco CMS: 10.8.0 - 10.8.9, 13.8.0

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External links
https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-4g8m-5mj5-c8xg

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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