Account Enumeration Vulnerability in Umbraco by Umbraco
CVE-2025-46736

5.3MEDIUM

Key Information:

Vendor

Umbraco

Status
Umbraco-cms
Vendor
CVE Published:
6 May 2025

What is CVE-2025-46736?

Umbraco CMS, a free and open-source .NET content management system, is susceptible to an account enumeration vulnerability. Prior to the updates in versions 10.8.10 and 13.8.1, an attacker could leverage the timing of API responses following user login attempts to ascertain the existence of specific accounts. This loophole poses a significant security risk, as it can be exploited to gather information about valid usernames. Users are strongly urged to update to the latest versions to mitigate this vulnerability, as there are no effective workarounds currently available.

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Deploy the Patch

Affected Version(s)

Umbraco-CMS >= 11.0.0-rc1, < 13.8.1 < 11.0.0-rc1, 13.8.1

Umbraco-CMS < 10.8.10 < 10.8.10

References

https://github.com/umbraco/Umbraco-CMS/security/advisorie...
x_refsource_CONFIRM
https://github.com/umbraco/Umbraco-CMS/commit/14fbd20665b...
x_refsource_MISC
https://github.com/umbraco/Umbraco-CMS/commit/34709be6cce...
x_refsource_MISC

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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