Improper input validation in PocketMine-MP - #VU125406
Published: January 6, 2023 / Updated: April 8, 2026
Vulnerability identifier: #VU125406
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: N/A
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 Banner->deserializeCompoundTag() when deserializing item NBT. A remote attacker can provide crafted NBT with invalid pattern colour values in an inventory transaction to cause a denial of service.
The issue can be triggered when processing item NBT from the network or disk.
Affected software
PocketMine-MP
Remediation
Install security update from vendor's website.
PocketMine-MP - update to 4.8.1