Vulnerability · Published Sep 6, 2026 · Assigned by VulnCheck

CVE-2021-48006PocketMine-MP before 4.0.3 Operator Privilege Escalation via Case Sensitivity

Low 3.3

In plain English

A low-severity security flaw in PocketMine-MP from pmmp. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.3Low

Exploit odds (30 days)0.2%top 95.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	pocketmine/pocketmine-mp	4.0.3	GHSA-j5qg-w9jg-3wg3

Affected products (as reported)

Vendor	Product	Versions
pmmp	PocketMine-MP	0 – before 4.0.3

Weakness: CWE-178 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

GitHub Security Advisory (GHSA-j5qg-w9jg-3wg3) vendor-advisory
Patch Commit patch
VulnCheck Advisory: PocketMine-MP before 4.0.3 Operator Privilege Escalation via Case Sensitivity third-party-advisory