#VU84404 Information Exposure Through an Error Message in Umbraco CMS - CVE-2023-49278

Vulnerability identifier: #VU84404

Vulnerability risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-49278

CWE-ID: CWE-209

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 sensitive information.

The vulnerability exists due to a missing brute-force protection. A remote attacker can enumerate usernames on the website.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Umbraco CMS: 8.0.0 - 8.18.9, 9.0.0 - 9.5.4, 10.0.0 - 10.8.0, 11.0.0 - 11.5.0, 12.0.0 - 12.3.3

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External links
https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-7x74-h8cw-qhxq

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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.