---
id: CVE-2022-51016
title: >-
  PocketMine-MP 3.x (before 3.27.0) does not implement Minecraft Bedrock
  protocol encryption, so the server cannot verify that a connecting client
  possesses the private key corresponding to its login token
summary: >-
  PocketMine-MP 3.x (before 3.27.0) does not implement Minecraft Bedrock
  protocol encryption, so the server cannot verify that a connecting client
  possesses the private key corresponding to its login token. An attacker who
  captures a valid…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-294
vendor: pmmp
product: PocketMine-MP
affected:
  - PocketMine-MP >= 3.0.0 < 3.27.0
published: '2026-09-07'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T16:17:06.777'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2022-51016'
references:
  - url: >-
      https://github.com/pmmp/PocketMine-MP/commit/d28be4eaf24a890f7ef110a51181a3d806a6acca
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-h79x-98r2-g6qc
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/pocketmine-mp-before-4.0.0-authentication-bypass-via-login-replay
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-10T14:22:36.392090Z'
epss: 0.00226
epssPercentile: 0.11921
ingestedAt: '2026-09-08T15:33:26.976Z'
---

## Overview

PocketMine-MP 3.x (before 3.27.0) does not implement Minecraft Bedrock protocol encryption, so the server cannot verify that a connecting client possesses the private key corresponding to its login token. An attacker who captures a valid login from another player's session (for example by tricking the player into connecting to an attacker-controlled server) can replay that login to impersonate the victim and pass XBOX Live authentication until the JWT token expires (typically 2-3 days). This affects servers directly reachable over the internet that are not behind a proxy with encryption enabled. Fixed in 4.0.0 and backported to 3.27.0.

## Remediation

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