Description
pac4j-oidc before 6.5.6 accepts OIDC callbacks carrying only an access token without authorization code or ID token validation. Attackers can substitute access tokens minted for other clients to create authenticated sessions without proper issuer, audience, nonce, or subject verification.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
pac4j pac4j
Default version status: unaffected
0 to < 6.5.6affected
pkg:maven/org.pac4j/pac4j-parentReferences
- https://github.com/pac4j/pac4j/commit/2270c3ff70e93cc43831e75702acd5135531237e ↗
- https://www.pac4j.org/blog/security-advisory-pac4j-core-oidc-saml.html ↗
- https://github.com/pac4j/pac4j/blob/pac4j-parent-6.5.5/pac4j-oidc/src/main/java/org/pac4j/oidc/credentials/extractor/OidcCredentialsExtractor.java ↗
- https://github.com/pac4j/pac4j ↗
- https://www.vulncheck.com/advisories/pac4j-oidc-before-6.5.6-authentication-bypass-via-access-token-substitution ↗