Vulnerabilities > CVE-2021-39177 - Unspecified vulnerability in Geysermc Geyser

047910
CVSS 9.8 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
low complexity
geysermc
critical
NVD
Published: 2021-08-30
Updated: 2024-11-21

Summary

Geyser is a bridge between Minecraft: Bedrock Edition and Minecraft: Java Edition. Versions of Geyser prior to 1.4.2-SNAPSHOT allow anyone that can connect to the server to forge a LoginPacket with manipulated JWT token allowing impersonation as any user. Version 1.4.2-SNAPSHOT contains a patch for the issue. There are no known workarounds aside from upgrading.

Vulnerable Configurations

Part Description Count
Application
Geysermc
1

References