A flaw was found in the Keycloak organization feature, which allows the incorrect assignment of an organization to a user if their username or email matches the organization’s domain pattern. This issue occurs at the mapper level, leading to misrepresentation in tokens. If an application relies on these claims for authorization, it may incorrectly assume a user belongs to an organization they are not a member of, potentially granting unauthorized access or privileges.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - A flaw was found in the Keycloak organization feature, which allows the incorrect assignment of an
    organization to a user if their username or email matches the organization’s domain pattern. This issue
    occurs at the mapper level, leading to misrepresentation in tokens. If an application relies on these
    claims for authorization, it may incorrectly assume a user belongs to an organization they are not a
    member of, potentially granting unauthorized access or privileges. (CVE-2025-1391)

The version of Keycloak installed on the remote host is 26.0 prior to 26.0.10, 26.1 prior to 26.1.3, or prior to 26.2.0. It is, therefore, affected by an Improper Authorization vulnerability. A flaw was found in the Keycloak organization feature, which allows the incorrect assignment of an organization to a user if their username or email matches the organization’s domain pattern. This issue occurs at the mapper level, leading to misrepresentation in tokens. If an application relies on these claims for authorization, it may incorrectly assume a user belongs to an organization they are not a member of, potentially granting unauthorized access or privileges.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
460933	Echo: org.keycloak:keycloak-services: security update to 26.0.10	Tenable Cloud Security	Echo Local Security Checks	Local	medium
460933	Echo: org.keycloak:keycloak-services: security update to 26.0.10	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
421072	SCA: security update for org.keycloak:keycloak-services (GHSA-gvgg-2r3r-53x7)	Tenable Cloud Security	SCA Checks	Local	medium
421072	SCA: security update for org.keycloak:keycloak-services (GHSA-gvgg-2r3r-53x7)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium
216477	Keycloak 26.x < 26.0.10 / 26.1.x < 26.1.3 / 26.2.0 Improper Authorization	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2025-1391

medium

Tenable Plugins

medium

medium

medium

medium

medium