GHSA-5f6v-j6xm-wwj9: Vikunja 2.2.0 before 2.7.1 Token Scope Bypass via Project Webhook Endpoints

Vikunja from 2.2.0 before 2.7.1 contains an authorization bypass vulnerability that allows holders of tokens scoped only to projectswebhooks to manage the owner's user-level webhooks by supplying userid in request bodies. Attackers can register user webhooks to their own receiver to obtain reminders and task payloads from all owner projects, and read, change or delete existing user webhooks.