Aptabase before commit 61d4c01 contains an authentication bypass vulnerability that allows unauthenticated attackers to forge sign-in links by using the publicly known example AUTH_SECRET. Attackers can enumerate registered e-mails via /api/_auth/signin, forge HS256 JWTs redeemed by /api/_auth/continue, impersonate users, export analytics data, and transfer app ownership.
CWE-1188