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Advisory record · GHSA-gvgg-2r3r-53x7

Improper Authorization in Keycloak Organization Mapper Allows Unauthorized Organization Claims

CVSS 5.4 MediumEPSS 0.0047 · 41st percentile

Published by the GitHub Advisory Database at 10 Mar 2025, 21:09 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.keycloak:keycloak-servicesMaven>=26.1.0, <26.1.3 || <26.0.1026.1.3, 26.0.10
Identifiers
GHSA-gvgg-2r3r-53x7 · CVE-2025-1391
Weakness (CWE)
CWE-284
Tags
Published
10 Mar 2025
Updated
10 Mar 2025

Machine-written summary

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

Keycloak Services (org.keycloak:keycloak-services) versions 26.1.0 to before 26.1.3, and versions before 26.0.10, map users to organizations based only on email or username patterns. An attacker who can self-register an account with a matching pattern can appear as a member of an organization in token claims, though they are not actually added to it. Upgrade to version 26.1.3 or 26.0.10. Restricting self-registration also reduces exposure.

Written 7 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
5.4 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N CNA (redhat)
  • CISA KEV Not listed.
  • EPSS 0.0047, the 41st percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 10 Mar 2025, 15:10 UTC Published by the maintainers as a GitHub repository advisory
  2. 31 Oct 2026, 15:11 UTC First seen by agentprime
  3. 31 Oct 2026, 15:11 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.