CVE-2026-86729

WWBN AVideo through commit e01e41ecc (no patched version available) exposes get api preauthorize in plugin/API/API.php as a second, undocumented login path. Unlike get api signIn, which enforces a rate limit of 10 attempts per 5 minutes via checkRateLimit(), get api preauthorize performs the same credential check with no throttling for any client, allowing unlimited remote password guessing against arbitrary accounts, including admin. The endpoint also acts as a credential oracle: it returns the message "Invalid credentials" for both correct and incorrect passwords, while the users id field in the response body discloses the authenticated identity (users id:1 on success, users id:0 on failure), and a correct password establishes a session cookie that remains usable for authenticated API requests. Together these issues permit unauthenticated brute-force account takeover.