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

Quick assessment

Affected
pmmp PocketMine-MP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PocketMine-MP 在 4.0.3 版本之前，在从 ops.txt 中移除操作员条目时，未执行不区分大小写的匹配。 函数会将传入的名称转换为小写，但仅移除完全匹配的条目，因此以非小写字母存储的操作员名称无法通过 命令撤销其操作员权限，导致该玩家将继续保持操作员状态，直到手动从 ops.txt 中删除对应条目。

CVSS 3.3 · Low

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
pmmp PocketMine-MP < 4.0.3 affected
4.0.3 unaffected
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I. Basic Information for CVE-2021-48006

Vulnerability Information
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Vulnerability Title
PocketMine-MP before 4.0.3 Operator Privilege Escalation via Case Sensitivity
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
大小写敏感处理不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
pmmp PocketMine-MP 0 ~ 4.0.3 -

II. Public POCs for CVE-2021-48006

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III. Intelligence Information for CVE-2021-48006

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Vendor Advisories for CVE-2021-48006 (2)

Same Patch Batch · pmmp · 2026-09-06 · 5 CVEs total

CVE-2022-51009 7.5 HIGH PocketMine-MP before 4.7.2 Denial of Service via Skin Geometry
CVE-2021-48007 6.5 MEDIUM PocketMine-MP before 3.18.1 Denial of Service via MovePlayerPacket
CVE-2020-37277 6.5 MEDIUM PocketMine-MP before 3.15.4 Denial of Service via InventoryTransaction
CVE-2022-51008 5.3 MEDIUM PocketMine-MP before 4.12.3 Denial of Service via Unauthenticated Sessions

IV. Related Vulnerabilities

Same product: PocketMine-MP
Same vendor: pmmp
Same weakness: CWE-178

V. Comments for CVE-2021-48006

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