CVE-2021-48006
lowpriority · track · 13EPSS 0.002 · 5 %ileUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 1.1–4.8
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
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affected products (1)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-j5qg-w9jg-3wg3Inability to de-op players if listed in ops.txt with non-lowercase letters2021-12-16ghsa · osvUS
### Impact Originally reported in iTXTech/Genisys#1188 ```txt PotterHarry98 potterharry98 ``` `deop PotterHarry98` will remove `potterharry98` from the ops.txt but not `PotterHarry98`. Operator permissions are checked using `Config->exists()` with `lowercase=true`, which will result in a match: https://github.com/pmmp/PocketMine-MP/blob/22bb1ce8e03dba57173debf0415390511d68e045/src/utils/Config.php#L449 This means that it's possible to make yourself impossible to de-op (using commands) by adding your name to ops.txt with uppercase letters. ### Patches 4d37b79ff7f9d9452e988387f97919a9a1c4954e ### Workarounds This can be easily addressed by removing the offending lines from ops.txt manually. ### For more information If you have any questions or comments about this advisory: * Open an issue in [pmmp/PocketMine-MP](https://github.com/pmmp/PocketMine-MP) * Email us at [team@pmmp.io](mailto:team@pmmp.io)
sources
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references (3) nvd
External citations — patches, advisories, analysis.
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