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CVE-2022-51016— PocketMine-MP before 4.0.0 Authentication Bypass via Login Replay

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 3.x 版本（3.27.0 之前）未实现 Minecraft Bedrock 协议加密，导致服务器无法验证连接客户端是否持有与其登录令牌（login token）对应的私钥。攻击者若截获了另一名玩家会话中的有效登录信息（例如诱使玩家连接到攻击者控制的服务器），即可重放该登录请求，从而冒充受害者，并在使用该 JWT 令牌过期前（通常为期 2-3 天）通过 XBOX Live 身份验证。此问题影响的是可直接通过互联网访问、且未处于启用加密的代理之后的服务器。该漏洞已在 4.0.0 中修复，并

CVSS 6.1 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
pmmp PocketMine-MP any unaffected
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I. Basic Information for CVE-2022-51016

Vulnerability Information
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Vulnerability Title
PocketMine-MP before 4.0.0 Authentication Bypass via Login Replay
Source: CVE Program / CVE List V5
Vulnerability Description
PocketMine-MP 3.x (before 3.27.0) does not implement Minecraft Bedrock protocol encryption, so the server cannot verify that a connecting client possesses the private key corresponding to its login token. An attacker who captures a valid login from another player's session (for example by tricking the player into connecting to an attacker-controlled server) can replay that login to impersonate the victim and pass XBOX Live authentication until the JWT token expires (typically 2-3 days). This affects servers directly reachable over the internet that are not behind a proxy with encryption enabled. Fixed in 4.0.0 and backported to 3.27.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用捕获-重放进行的认证绕过
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
pmmp PocketMine-MP - -

II. Public POCs for CVE-2022-51016

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2022-51016

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Patches & Fixes for CVE-2022-51016 (1)

Vendor Advisories for CVE-2022-51016 (2)

Same Patch Batch · pmmp · 2026-09-07 · 9 CVEs total

CVE-2022-51017 7.5 HIGH PocketMine-MP before 3.26.5 and 4.0.5 Denial of Service via Skin Data
CVE-2022-51013 6.5 MEDIUM PocketMine-MP before 4.2.3 Denial of Service via NBT Metadata
CVE-2022-51010 6.5 MEDIUM PocketMine-MP before 4.4.2 Server Crash via Item ID
CVE-2022-51014 6.5 MEDIUM PocketMine-MP before 4.0.7 Denial of Service via JSON Decoding
CVE-2022-51012 6.5 MEDIUM PocketMine-MP before 4.2.9 Denial of Service via NBT Deserialization
CVE-2022-51018 6.5 MEDIUM PocketMine-MP before 3.26.5 Input Validation via Book Pages
CVE-2022-51015 6.5 MEDIUM PocketMine-MP before 4.0.6 Denial of Service via PlayerActionPacket
CVE-2022-51011 4.3 MEDIUM PocketMine-MP before 4.2.10 Denial of Service via Chat Messages

IV. Related Vulnerabilities

Same product: PocketMine-MP
Same vendor: pmmp
Same weakness: CWE-294

V. Comments for CVE-2022-51016

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