CVE-2023-54392

PocketMine-MP versions >= 4.20.0 before 4.22.3 (and before 5.2.1 in the 5.x branch) fail to validate NBT tag types in BlockActorDataPacket. A player can crash the server by sending a packet containing sign NBT data with an incorrect tag type, triggering an unhandled UnexpectedTagTypeException that terminates the server process.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/pmmp/PocketMine-MP/commit/0c250a2ef09627b48aa52302f6cc7e1f2afb70ea
https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-7wrv-6h42-w54f
https://www.vulncheck.com/advisories/pocketmine-mp-before-4.22.3-denial-of-service-via-blockactordatapacket

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-09 14:17

Updated : 2026-09-09 20:20

NVD link : CVE-2023-54392

Mitre link : CVE-2023-54392

CVE.ORG link : CVE-2023-54392

JSON object : View

Products Affected

No product.

CWE

CWE-20

Improper Input Validation

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