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CVE-2023-54392— PocketMine-MP before 4.22.3 Denial of Service via BlockActorDataPacket

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.

PMMP PocketMine-MP是PMMP团队开源的一款基岩版游戏服务器软件。 PMMP PocketMine-MP 4.20.0版本至4.22.3之前版本和5.2.1之前版本存在输入验证错误漏洞，该漏洞源于未能验证BlockActorDataPacket中的NBT标签类型，玩家可通过发送包含错误标签类型的告示牌NBT数据的数据包，触发未处理的UnexpectedTagTypeException异常，导致服务器进程终止崩溃。

CVSS 6.5 · Medium EPSS 0.38% · P30

Possible ATT&CK Techniques 1 AI

T1027 · Obfuscated Files or Information

Affected Version Matrix 2

VendorProduct Version RangeStatus
pmmp PocketMine-MP 4.20.0< 4.22.3 affected
5.0.0< 5.2.1 affected
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I. Basic Information for CVE-2023-54392

Vulnerability Information
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Vulnerability Title
PocketMine-MP before 4.22.3 Denial of Service via BlockActorDataPacket
Source: CVE Program / CVE List V5
Vulnerability Description
PocketMine-MP versions >= 4.20.0 before 4.22.3 (and before 5.2.1 in the 5.x branch) fail to validate NBT tag types in BlockActorDataPacket. A player can crash the server by sending a packet containing sign NBT data with an incorrect tag type, triggering an unhandled UnexpectedTagTypeException that terminates the server process.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
PMMP PocketMine-MP 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PMMP PocketMine-MP是PMMP团队开源的一款基岩版游戏服务器软件。 PMMP PocketMine-MP 4.20.0版本至4.22.3之前版本和5.2.1之前版本存在输入验证错误漏洞，该漏洞源于未能验证BlockActorDataPacket中的NBT标签类型，玩家可通过发送包含错误标签类型的告示牌NBT数据的数据包，触发未处理的UnexpectedTagTypeException异常，导致服务器进程终止崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
pmmp PocketMine-MP 4.20.0 ~ 4.22.3 -

II. Public POCs for CVE-2023-54392

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III. Intelligence Information for CVE-2023-54392

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Patches & Fixes for CVE-2023-54392 (1)

Vendor Advisories for CVE-2023-54392 (2)

Same Patch Batch · pmmp · 2026-09-09 · 18 CVEs total

CVE-2023-54355 7.5 HIGH PocketMine-MP 5.2.0 Server Crash via Incorrect EC Curve
CVE-2026-86199 7.5 HIGH PocketMine-MP before 5.43.1 Denial of Service via unauthenticated login
CVE-2026-86201 7.5 HIGH PocketMine-MP before 5.41.1 LogDoS via LoginPacket clientData
CVE-2024-58381 7.5 HIGH PocketMine-MP before 5.11.1 Denial of Service via LoginPacket
CVE-2023-54390 7.5 HIGH PocketMine-MP before 5.3.1 Denial of Service via LoginPacket
CVE-2023-54393 7.5 HIGH PocketMine-MP before 4.20.5 Denial of Service via LoginPacket
CVE-2024-58380 6.5 MEDIUM PocketMine-MP before 5.11.2 Denial of Service via BookEditPacket
CVE-2023-54396 6.5 MEDIUM PocketMine-MP before 4.8.1 Server Crash via Banner NBT
CVE-2025-71417 6.5 MEDIUM PocketMine-MP before 5.32.1 Denial of Service via ResourcePackClientResponsePacket
CVE-2026-86204 6.5 MEDIUM PocketMine-MP before 5.39.2 Denial of Service via ModalFormResponsePacket
CVE-2025-71418 5.3 MEDIUM PocketMine-MP before 5.25.2 Denial of Service via explode
CVE-2026-86200 5.3 MEDIUM PocketMine-MP before 5.42.1 LogDoS via LoginPacket clientData JWT
CVE-2023-54395 4.3 MEDIUM PocketMine-MP before 4.12.5 Denial of Service via ModalFormResponsePacket
CVE-2026-86202 4.3 MEDIUM PocketMine-MP before 5.39.2 Network Amplification via ActorEventPacket
CVE-2023-54394 4.3 MEDIUM PocketMine-MP before 4.18.0-ALPHA2 Bandwidth Amplification via InventoryTransactionPacket
CVE-2026-86198 4.2 MEDIUM PocketMine-MP before 5.44.2 Denial of Service via ResourcePackClientResponsePacket
CVE-2026-86203 3.7 LOW PocketMine-MP before 5.39.2 Item Duplication via Despawn State

IV. Related Vulnerabilities

Same product: PocketMine-MP
Same vendor: pmmp
Same weakness: CWE-20