Red Hat Keycloak Organization Mapper improper authorization

Summaryinfo

A vulnerability was found in Red Hat Keycloak. It has been classified as critical. Affected by this vulnerability is an unknown functionality of the component Organization Mapper. The manipulation leads to improper authorization. This vulnerability is documented as CVE-2025-1391. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Red Hat Keycloak (unknown version). This issue affects an unknown code block of the component Organization Mapper. The manipulation with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at bugzilla.redhat.com. The identification of this vulnerability is CVE-2025-1391 since 02/17/2025. The exploitation is known to be easy. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 03/11/2025). MITRE ATT&CK project uses the attack technique T1548.002 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Red Hat

Name

• Keycloak

License

• open-source

Website

• Vendor: https://www.redhat.com/

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