Vulnerability · Published Sep 9, 2026 · Assigned by VulnCheck
CVE-2023-54390PocketMine-MP before 5.3.1 Denial of Service via LoginPacket
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 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.6%top 50.6% 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 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | pocketmine/pocketmine-mp | 5.3.1 | GHSA-92jh-gwch-jq38 |
| Packagist | pocketmine/pocketmine-mp | 4.23.1 | GHSA-92jh-gwch-jq38 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| pmmp | PocketMine-MP | 0 – before 4.23.15.0.0 – before 5.3.1 |
Weakness: CWE-1025 · 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-92jh-gwch-jq38) vendor-advisory
- Patch Commit patch
- VulnCheck Advisory: PocketMine-MP before 5.3.1 Denial of Service via LoginPacket third-party-advisory