---
id: CVE-2021-48007
title: >-
  PocketMine-MP versions before 3.18.1 fail to validate NaN or INF values in
  MovePlayerPacket position and rotation fields
summary: >-
  PocketMine-MP versions before 3.18.1 fail to validate NaN or INF values in
  MovePlayerPacket position and rotation fields. Malicious clients can send
  crafted movement packets with invalid floating-point values to crash servers
  through unh…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-20
vendor: pmmp
product: PocketMine-MP
affected:
  - PocketMine-MP < 3.18.1
published: '2026-09-06'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T14:17:07.883'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-48007'
references:
  - url: >-
      https://github.com/pmmp/PocketMine-MP/commit/fb20bb38327b4c08ee3976640cd0dd547388a638
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-fm35-jgg3-3grx
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/pocketmine-mp-before-3.18.1-denial-of-service-via-moveplayerpacket
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-09T13:56:10.359260Z'
epss: 0.00295
epssPercentile: 0.22376
ingestedAt: '2026-09-07T00:02:13.921Z'
---

## Overview

PocketMine-MP versions before 3.18.1 fail to validate NaN or INF values in MovePlayerPacket position and rotation fields. Malicious clients can send crafted movement packets with invalid floating-point values to crash servers through unhandled mathematical operations or prevent clients from rendering other players.

## Remediation

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