CVE-2023-54393 PocketMine-MP - Denial of Service

PocketMine-MP < 4.20.5 contains a denial of service vulnerability caused by improper validation in JsonMapper during LoginPacket JSON parsing, letting attackers crash the server by sending malformed JSON structures, exploit requires network access.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.35% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
9 September 2026
Updated
15 October 2026
Weakness
CWE-20

Vendor fix

Update to version 4.20.5 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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