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GHSA-9vm7-v8wj-3fqw

keycloak-core: open redirect via "form_post.jwt" JARM response mode

Source: GitHub Advisory Database (reviewed) Moderate CVE-2023-6927

Packages

EcosystemPackageAffectedFixed in
Maven org.keycloak:keycloak-core < 23.0.4 23.0.4

Details

As written in the advisory (Markdown source, shown as plain text).

An incomplete fix was found in Keycloak Core patch. An attacker can steal authorization codes or tokens from clients using a wildcard in the JARM response mode "form_post.jwt". It is observed that changing the response_mode parameter in the original proof of concept from "form_post" to "form_post.jwt" can bypass the security patch implemented to address CVE-2023-6134.

References

External links from the advisory. They lead to third-party sites.