#VU103229 Information disclosure in Umbraco CMS - CVE-2025-24011

Vulnerability identifier: #VU103229

Vulnerability risk: Medium

CVSSv4.0: 5.5 [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:P/U:Green]

CVE-ID: CVE-2025-24011

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: Yes

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 excessive data output by the application based on an analysis of response codes and timing. A remote attacker can gain unauthorized access to sensitive information on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Umbraco CMS: 14.0.0 - 14.3.1, 15.0.0 - 15.1.1

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External links
https://github.com/umbraco/Umbraco-CMS/commit/559c6c9f312df1d6eb1bde82c4b81c0896da6382
https://github.com/umbraco/Umbraco-CMS/commit/839b6816f2ae3e5f54459a0f09dad6b17e2d1e07
https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-hmg4-wwm5-p999

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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. However, proof of concept for this vulnerability is available.