PocketMine-MP versions before 4.20.5 contain a denial of service vulnerability in LoginPacket JSON parsing due to improper validation in the JsonMapper dependency. Attackers can send malformed JSON structures in LoginPacket to crash the server.
History

Wed, 09 Sep 2026 13:45:00 +0000

Type Values Removed Values Added
Description PocketMine-MP versions before 4.20.5 contain a denial of service vulnerability in LoginPacket JSON parsing due to improper validation in the JsonMapper dependency. Attackers can send malformed JSON structures in LoginPacket to crash the server.
Title PocketMine-MP before 4.20.5 Denial of Service via LoginPacket
Weaknesses CWE-20
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': '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-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-09-09T13:31:52.111Z

Updated: 2026-09-09T13:31:52.111Z

Reserved: 2026-09-05T20:59:39.275Z

Link: CVE-2023-54393

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-09-09T14:17:09.447

Modified: 2026-09-09T20:20:21.673

Link: CVE-2023-54393

cve-icon Redhat

No data.