High severity · published Sep 9, 2026
CVE-2023-54390
PocketMine-MP before 5.3.1 Denial of Service via LoginPacket
7.5
CVSS
0.6%
EPSS
No
On KEV
Description
PocketMine-MP versions before 5.3.1 and 4.23.1 contain a denial of service vulnerability in LoginPacket JSON parsing due to improper null value handling in arrays. Attackers can send malformed JSON with unexpected null elements in LoginPacket to crash the server.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PO
PocketMine-MP · pmmp
before 4.23.1; 5.0.0 before 5.3.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-54390
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-54390
vendor-advisory
https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-92jh-gwch-jq38
patch
https://github.com/pmmp/PocketMine-MP/commit/4f90e8dab1c9df331fad7d3d89823404e882668c
third-party-advisory
https://www.vulncheck.com/advisories/pocketmine-mp-before-5.3.1-denial-of-service-via-loginpacket
More from PocketMine-MP
7.5
CVE-2026-86201
PocketMine-MP before 5.41.1 LogDoS via LoginPacket clientData
7.5
CVE-2026-86199
PocketMine-MP before 5.43.1 Denial of Service via unauthenticated login
7.5
CVE-2024-58381
PocketMine-MP before 5.11.1 Denial of Service via LoginPacket
7.5
CVE-2023-54393
PocketMine-MP before 4.20.5 Denial of Service via LoginPacket
7.5
CVE-2023-54355
PocketMine-MP 5.2.0 Server Crash via Incorrect EC Curve