Improper input validation in PocketMine-MP - CVE-2023-54392
Published: July 14, 2023 / Updated: September 14, 2026
Vulnerability identifier: #VU125417
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-54392
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper input validation in BlockActorDataPacket handling when processing sign NBT data. A remote attacker can send a specially crafted packet with incorrect NBT tag types to cause a denial of service.
The issue was demonstrated through sign editing data, and other packet types may also be affected.
Affected software
PocketMine-MP
How to mitigate CVE-2023-54392
Install security update from vendor's website.
PocketMine-MP - addressed in versions 4.22.3, 5.2.1