| Package | Affected versions | Patched versions |
|---|---|---|
| org.apache.cxf:cxf-rt-rs-security-oauth2 | ≥ 4.2.0, < 4.2.2< 4.1.7 | 4.2.24.1.7 |
| cxf | ≥ 4.2.0, < 4.2.2< 4.1.7 | 4.2.24.1.7 |
The JwtAccessTokenValidator class in Apache CXF fails to validate the 'aud' (Audience) claims of incoming JWT access tokens. This allows a JWT issued for one Resource Server to be successfully replayed against a completely different Resource Server, leading to Token Confusion/Routing attacks. Users are recommended to upgrade to versions 4.2.2 or 4.1.7, which fixes this issue.
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