| Package | Affected versions | Patched versions |
|---|---|---|
| org.springframework.security:spring-security-oauth2-authorization-server | ≥ 1.2.0, < 1.2.3< 1.1.6 | 1.2.31.1.6 |
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.
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