CVE-2023-54355
Published:September 09, 2026
Updated:September 22, 2026
PocketMine-MP versions before 5.3.1 and 4.23.1 fail to validate that the identityPublicKey in LoginPacket uses the required secp384r1 elliptic curve. Attackers can provide LoginPackets with keys using different curves or non-EC key types to pass login verification but trigger an uncaught exception during ECDH key derivation, crashing the server.
Affected Packages
https://github.com/pmmp/PocketMine-MP.git (GITHUB):
Affected version(s) >=4.0.0 <4.23.1Fix Suggestion:
Update to version 4.23.1https://github.com/pmmp/PocketMine-MP.git (GITHUB):
Affected version(s) >=5.2.0 <5.3.1Fix Suggestion:
Update to version 5.3.1pocketmine/pocketmine-mp (PHP):
Affected version(s) >=5.2.0 <5.3.1Fix Suggestion:
Update to version 5.3.1pocketmine/pocketmine-mp (PHP):
Affected version(s) >=4.0.0 <4.23.1Fix Suggestion:
Update to version 4.23.1Related Resources (3)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Improper Verification of Cryptographic Signature
EPSS
Base Score:
0.22