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CVE-2025-24011

Umbraco CMS Vulnerable to User Enumeration Feasible Based On Management API Timing and Response Codes

MEDIUM
5.3
CVSS Score
Published: January 21, 2025 at 03:27 PM UTC
Updated: June 17, 2026 at 08:57 AM UTC
1 product affected across 1 vendorUmbraco-CMS

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Severity
MEDIUM5.3
Exploit prediction
EPSS 2%
SSVC
No known exploit

Description

Umbraco is a free and open source .NET content management system. Starting in version 14.0.0 and prior to versions 14.3.2 and 15.1.2, it's possible to determine whether an account exists based on an analysis of response codes and timing of Umbraco management API responses. Versions 14.3.2 and 15.1.2 contain a patch. No known workarounds are available.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Umbraco-CMS· Umbraco
95%
v < 14.3.2v < 15.1.214.0.0 ≤ v < 14.3.215.0.0 ≤ v < 15.1.2
Affected range stops below 14.3.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.1.2, so it looks safe — our inference, not a vendor statement

References (3)

x_refsource_MISCPatch
Source: [email protected]
https://github.com/umbraco/Umbraco-CMS/commit/559c6c9f312df1d6eb1bde82c4b81c0896da6382
x_refsource_MISCPatch
Source: [email protected]
https://github.com/umbraco/Umbraco-CMS/commit/839b6816f2ae3e5f54459a0f09dad6b17e2d1e07
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-hmg4-wwm5-p999

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-200CWE-203

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