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GSA_kwCzR0hTQS03ZnBqLTlocjgtMjh2aM4AA7JC

Low EPSS: 0.0006% (0.19176 Percentile) EPSS:

Keycloak vulnerable to impersonation via logout token exchange

Affected Packages Affected Versions Fixed Versions
maven:org.keycloak:keycloak-services >= 23.0.0, < 24.0.3, < 22.0.10 24.0.3, 22.0.10
90 Dependent packages
561 Dependent repositories

Affected Version Ranges

All affected versions

5.0.0, 6.0.0, 6.0.1, 7.0.0, 7.0.1, 8.0.0, 8.0.1, 8.0.2, 9.0.0, 9.0.2, 9.0.3, 10.0.0, 10.0.1, 10.0.2, 11.0.0, 11.0.1, 11.0.2, 11.0.3, 12.0.0, 12.0.1, 12.0.2, 12.0.3, 12.0.4, 13.0.0, 13.0.1, 14.0.0, 15.0.0, 15.0.1, 15.0.2, 15.1.0, 15.1.1, 16.0.0, 16.1.0, 16.1.1, 17.0.0, 17.0.1, 18.0.0, 18.0.1, 18.0.2, 19.0.0, 19.0.1, 19.0.2, 19.0.3, 20.0.0, 20.0.1, 20.0.2, 20.0.3, 20.0.4, 20.0.5, 21.0.0, 21.0.1, 21.0.2, 21.1.0, 21.1.1, 21.1.2, 22.0.0, 22.0.1, 22.0.2, 22.0.3, 22.0.4, 22.0.5, 23.0.0, 23.0.1, 23.0.2, 23.0.3, 23.0.4, 23.0.5, 23.0.6, 23.0.7, 24.0.0, 24.0.1, 24.0.2

All unaffected versions

24.0.3, 24.0.4, 24.0.5, 25.0.0, 25.0.1, 25.0.2, 25.0.3, 25.0.4, 25.0.5, 25.0.6, 26.0.0, 26.0.1, 26.0.2, 26.0.3, 26.0.4, 26.0.5, 26.0.6, 26.0.7, 26.0.8, 26.1.0, 26.1.1, 26.1.2, 26.1.3, 26.1.4, 26.1.5, 26.2.0, 26.2.1, 26.2.2, 26.2.3, 26.2.4, 26.2.5, 26.3.0, 26.3.1, 26.3.2

Keycloak was found to not properly enforce token types when validating signatures locally. An authenticated attacker could use this flaw to exchange a logout token for an access token and possibly gain access to data outside of enforced permissions.

References: