CVE-2023-49274 Umbraco CMS SMTP misconfiguration exposes potential registered user email

What is CVE-2023-49274?

CVE-2023-49274 is a low-severity vulnerability in Umbraco Umbraco Cms, published on 12 Dec 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Umbraco is an ASP.NET content management system (CMS). Starting in version 8.0.0 and prior to versions 8.18.10, 10.8.1, and 12.3.4, a user enumeration attack is possible when SMTP is not set up correctly, but reset password is enabled. Versions 8.18.10, 10.8.1, and 12.3.4 contain a patch for this issue.

Weakness: CWE-200

Which versions are affected by CVE-2023-49274?

6 open source packages ship an affected version, including Umbraco.CMS. It affects 1 product.

Products include Umbraco Umbraco Cms.

How do I fix CVE-2023-49274?

Upgrade Umbraco.CMS to a fixed version for your release line: 12.3.4, 8.18.10 or 10.8.1.

Is CVE-2023-49274 being exploited?

There is no known exploitation of CVE-2023-49274 in the wild and no public exploit code.

Other vulnerabilities in Umbraco Umbraco Cms

• CVE-2025-67288 Umbraco CMS has an arbitrary file upload vulnerability Critical 10.0
• CVE-2014-10074 File upload in n/a Critical 9.8
• CVE-2012-1301 Server-side request forgery in n/a Critical 9.8
• CVE-2012-10054 Umbraco CMS < 4.7.1 codeEditorSave.asmx RCE Critical 9.3
• CVE-2025-32017 Umbraco has a Management API Vulnerability to Path Traversal With Authenticated Users High 8.8

All Umbraco Umbraco Cms vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-8qp8-9rpw-j46c.