Minecraft Authme Bypass [updated] Site

permissions: authme.admin.unregister: - rank.senior_admin

If you run a BungeeCord or Velocity proxy:

Given the context, if you're looking to develop a legitimate feature related to authentication or security within Minecraft, here are some points to consider:

AuthMe includes a forceLogin feature that allows administrators to log in as any user via console commands. If a server's console or an admin account with high-level permissions (like authme.admin.* ) is compromised, the plugin's own security features can be used to bypass any player's password. Legitimate Bypasses for Premium Players

Always operate within the bounds of the law and the specific server's policies. Minecraft Authme Bypass

Ensure that unauthenticated players are automatically teleported to an isolated, empty "Login World" or a locked lobby upon joining. This prevents unverified players from rendering chunks, interacting with items, or viewing the coordinates of base builds in your main world before they type their password. Use Two-Factor Authentication (2FA) for Admins

forceLoginBeforeTeleport: true

Cracked servers generate offline UUIDs (Universally Unique Identifiers) based strictly on the player's username.

: Occasionally, specific vulnerabilities in AuthMe are documented as official CVEs (Common Vulnerabilities and Exposures), which provide a professional-grade breakdown of the "bypass" logic. permissions: authme

The most common and dangerous bypass occurs in BungeeCord networks. If a "child" server (like a lobby or survival server) has online-mode=false but is not correctly firewalled, an attacker can connect directly to that server's port, bypassing the main proxy where the authentication plugin usually sits.

Historically, attackers used subtle variations of username characters to exploit how AuthMe handles data storage (such as SQLite or MySQL). For example, if a server administrator's username is Admin , an attacker might attempt to log in using admin (lowercase) or variations using special Unicode characters that look identical to standard Latin letters.

Simple logic mistakes also play a role. For example, when the configuration variable ProtectInventoryBeforeLogIn was toggled and the plugin was reloaded, a race condition could occur. This bug would cause the server to momentarily "leak" a player's protected inventory and authentication status, allowing them to bypass the login wall before the protection re-engaged. In other cases, the IP-based registration check could be bypassed by registering an account with the IP 127.0.0.1 , which caused the plugin to skip the standard IP validation logic.

Regularly monitor server logs and activity for suspicious behavior. we aren’t teaching griefing.

: Use a permissions plugin (like LuckPerms) to ensure the default group has zero permissions until they are authenticated by AuthMe.

Today, we aren’t teaching griefing. We are looking under the hood at the methodology of an AuthMe bypass so you, the admin, can patch the holes.

Install the BungeeGuard plugin on both your proxy and your backend backend servers. It utilizes a secure token system to ensure backend servers only accept connections originating from your specific proxy.