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Advisory record · GHSA-hmg4-wwm5-p999

Umbraco Allows User Enumeration Feasible Based On Management API Timing and Response Codes

CVSS 5.3 MediumEPSS 0.016 · 76th percentile

Published by the GitHub Advisory Database at 21 Jan 2025, 21:21 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
Umbraco.CmsNuGet>=14.0.0, <14.3.2 || >=15.0.0, <15.1.214.3.2, 15.1.2
Identifiers
GHSA-hmg4-wwm5-p999 · CVE-2025-24011
Weakness (CWE)
CWE-200 · CWE-203
Tags
Published
21 Jan 2025
Updated
17 Apr 2025

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Umbraco.Cms versions 14.0.0 to before 14.3.2 and 15.0.0 to before 15.1.2 are affected. An attacker who can reach the management API can determine whether a given account exists by analyzing response codes and timing. Upgrade to 14.3.2 or 15.1.2. The source lists no workarounds.

Written 9 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
5.3 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.016, the 76th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 21 Jan 2025, 10:08 UTC Published by the maintainers as a GitHub repository advisory
  2. 31 Oct 2026, 15:22 UTC First seen by agentprime
  3. 31 Oct 2026, 15:22 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.