Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| GeyserMC | Geyser | <= 1.4.1-SNAPSHOT | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.geysermc:connector | < 1.4.2-SNAPSHOT | 1.4.2-SNAPSHOT | GHSA-h77f-xxx7-4858 |