CVE-2024-22258: Improper Authentication in Spring Authorization Server

March 20, 2024 (updated December 5, 2024)

Spring Authorization Server versions 1.0.0 - 1.0.5, 1.1.0 - 1.1.5, 1.2.0 - 1.2.2 and older unsupported versions are susceptible to a PKCE Downgrade Attack for Confidential Clients.

Specifically, an application is vulnerable when a Confidential Client uses PKCE for the Authorization Code Grant.

An application is not vulnerable when a Public Client uses PKCE for the Authorization Code Grant.

References

github.com/advisories/GHSA-x637-x8p3-5p22
github.com/spring-projects/spring-authorization-server/commit/a7035d22bd2de6c24e7125623d38fb83d8f659a9
nvd.nist.gov/vuln/detail/CVE-2024-22258
spring.io/security/cve-2024-22258

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