CVE-2026-86729

WWBN AVideo through commit e01e41ecc (no patched version available) exposes getapipreauthorize in plugin/API/API.php as a second, undocumented login path. Unlike getapisignIn, which enforces a rate limit of 10 attempts per 5 minutes via checkRateLimit(), getapipreauthorize 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 usersid field in the response body discloses the authenticated identity (usersid: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.