Description
pac4j-core before 6.5.6 contains an open redirect vulnerability in DefaultLogoutLogic.perform() that accepts backslash-prefixed logout redirect targets matching logoutUrlPattern. Attackers can craft logout links with backslash-prefixed external hosts that browsers normalize into network-path references, redirecting victims to attacker-controlled sites after logout.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| pac4j | pac4j | < 6.5.6 | 6.5.6 |
References
- Patch Commit patch
- pac4j Security Advisory for pac4j-core, pac4j-oidc and pac4j-saml vendor-advisory
- https://github.com/pac4j/pac4j/blob/pac4j-parent-6.5.5/pac4j-core/src/main/java/org/pac4j/core/engine/DefaultLogoutLogic.java technical-description
- https://github.com/pac4j/pac4j product
- VulnCheck Advisory: pac4j-core before 6.5.6 Open Redirect via Backslash Logout third-party-advisory