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https://issues.apache.org/jira/browse/CXF-9225?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Colm O hEigeartaigh reassigned CXF-9225:
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Assignee: Colm O hEigeartaigh
> OIDC RP does not enforce nonce validation for Implicit/Hybrid flows
> -------------------------------------------------------------------
>
> Key: CXF-9225
> URL: https://issues.apache.org/jira/browse/CXF-9225
> Project: CXF
> Issue Type: Bug
> Components: JAX-RS, JAX-RS Security
> Affects Versions: 4.2.2
> Reporter: Guanping Zhang
> Assignee: Colm O hEigeartaigh
> Priority: Minor
>
> In the CXF OIDC Relying Party (RP) implementation
> ({{{}OidcClientCodeRequestFilter{}}}), the {{nonce}} claim in the ID Token is
> validated _if_ it is present. However, the pipeline does not enforce the
> presence of a {{nonce}} for Implicit and Hybrid flows.
>
> Per OpenID Connect Core 1.0 §3.1.2.1 and §3.2.2.5, the {{nonce}} parameter is
> REQUIRED for the Implicit Flow and Hybrid Flow to mitigate replay attacks. If
> an integrator omits the {{nonce}} in the initial request, the RP silently
> accepts the ID Token without replay protection, degrading the security of the
> flow without warning the developer.
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