---
id: CVE-2021-48006
title: >-
  PocketMine-MP before 4.0.3 does not perform case-insensitive matching when
  removing operator entries from ops.txt
summary: >-
  PocketMine-MP before 4.0.3 does not perform case-insensitive matching when
  removing operator entries from ops.txt. The removeOp function lowercases the
  supplied name but only removes an exactly matching entry, so an operator name
  stored …
severity: low
cvss: 3.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-178
vendor: pmmp
product: PocketMine-MP
affected:
  - PocketMine-MP < 4.0.3
published: '2026-09-06'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T18:17:01.233'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-48006'
references:
  - url: >-
      https://github.com/pmmp/PocketMine-MP/commit/4d37b79ff7f9d9452e988387f97919a9a1c4954e
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-j5qg-w9jg-3wg3
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/pocketmine-mp-before-4.0.3-operator-privilege-escalation-via-case-sensitivity
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
epss: 0.00109
epssPercentile: 0.01395
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-18T17:07:41.902767Z'
ingestedAt: '2026-09-07T00:02:13.877Z'
---

## Overview

PocketMine-MP before 4.0.3 does not perform case-insensitive matching when removing operator entries from ops.txt. The removeOp function lowercases the supplied name but only removes an exactly matching entry, so an operator name stored with non-lowercase letters cannot be revoked using the deop command, leaving the player as an operator until the entry is removed from ops.txt manually.

## Remediation

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