What’s Vulnerable › Vulnerabilities

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

• Severity: low (CVSS 3.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-06 · updated 2026-10-08
• Weakness: CWE-178

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 products

• pmmp PocketMine-MP: before 4.0.3 — fixed in 4.0.3

How to fix

Upgrade to a fixed version: pmmp PocketMine-MP 4.0.3. Check the vendor advisory for mitigations.

References

• https://github.com/pmmp/PocketMine-MP/commit/4d37b79ff7f9d9452e988387f97919a9a1c4954e
• https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-j5qg-w9jg-3wg3
• https://www.vulncheck.com/advisories/pocketmine-mp-before-4.0.3-operator-privilege-escalation-via-case-sensitivity

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