Information disclosure in Umbraco CMS

1) Observable Response Discrepancy

EUVDB-ID: #VU108681

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 - Observable Response Discrepancy

Exploit availability: No

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 - 13.8.0

CPE2.3

• cpe:2.3:a:umbraco:umbraco:10.8.0:*:*:*:*:*:*:*
• cpe:2.3:a:umbraco:umbraco:10.8.1:*:*:*:*:*:*:*
• cpe:2.3:a:umbraco:umbraco:10.8.2:*:*:*:*:*:*:*
• cpe:2.3:a:umbraco:umbraco:10.8.3:*:*:*:*:*:*:*
• cpe:2.3:a:umbraco:umbraco:*:*:*:*:*:*:*:*
• cpe:2.3:a:umbraco:umbraco:10.8.5:*:*:*:*:*:*:*

External links

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

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.