CVE-2026-31946 OpenOLAT: Authentication bypass via forged JWT in OIDC implicit flow

OpenOlat is an open source web-based e-learning platform for teaching, learning, assessment and communication. From version 10.5.4 to before version 20.2.5, OpenOLAT's OpenID Connect implicit flow implementation does not verify JWT signatures. The JSONWebToken.parse method silently discards the...