Vulnerability · Published Sep 9, 2026 · Assigned by VulnCheck

CVE-2023-54355PocketMine-MP 5.2.0 Server Crash via Incorrect EC Curve

High 7.5

In plain English

A high-severity security flaw in PocketMine-MP from pmmp. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.4%top 67.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

PocketMine-MP versions before 5.3.1 and 4.23.1 fail to validate that the identityPublicKey in LoginPacket uses the required secp384r1 elliptic curve. Attackers can provide LoginPackets with keys using different curves or non-EC key types to pass login verification but trigger an uncaught exception during ECDH key derivation, crashing the server.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	pocketmine/pocketmine-mp	5.3.1	GHSA-79rc-jjh6-rc89

Affected products (as reported)

Vendor	Product	Versions
pmmp	PocketMine-MP	0 – before 4.23.15.2.0 – before 5.3.1

Weakness: CWE-347 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

GitHub Security Advisory (GHSA-79rc-jjh6-rc89) vendor-advisory
Patch Commit patch
VulnCheck Advisory: PocketMine-MP 5.2.0 Server Crash via Incorrect EC Curve third-party-advisory