---
id: CVE-2023-54355
title: >-
  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
summary: >-
  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…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-347
vendor: pmmp
product: PocketMine-MP
affected:
  - PocketMine-MP
published: '2026-09-09'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T15:17:24.437'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-54355'
references:
  - url: >-
      https://github.com/pmmp/PocketMine-MP/commit/4e646d19a4a1e0d082bd4d1f5a58ae0182a268d9
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-79rc-jjh6-rc89
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/pocketmine-mp-5.2.0-server-crash-via-incorrect-ec-curve
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-10T14:22:30.805926Z'
ingestedAt: '2026-09-13T12:15:18.721Z'
epss: 0.00225
epssPercentile: 0.13385
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.