Medium severity · published Sep 9, 2026
CVE-2023-54392
PocketMine-MP before 4.22.3 Denial of Service via BlockActorDataPacket
6.5
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 45% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PO
PocketMine-MP · pmmp
4.20.0 before 4.22.3; 5.0.0 before 5.2.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-54392
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-54392
vendor-advisory
https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-7wrv-6h42-w54f
patch
https://github.com/pmmp/PocketMine-MP/commit/0c250a2ef09627b48aa52302f6cc7e1f2afb70ea
third-party-advisory
https://www.vulncheck.com/advisories/pocketmine-mp-before-4.22.3-denial-of-service-via-blockactordatapacket
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