GHSA-xh99-hw7h-wf63: Pocketmine/pocketmine mp Unchecked Validity Of Facing Values Vulnerability

HIGH
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CVSS 7.5
Published
Advisory Summary

GHSA-xh99-hw7h-wf63 is a HIGH (CVSS 7.5) unchecked validity of facing values vulnerability (General Security Weakness) affecting Pocketmine/pocketmine mp libraries in the Packagist ecosystem. The issue involves unchecked validity of facing values in playeractionpacket. Remediation is available by upgrading affected packages to version 4.0.6.

GHSA-xh99-hw7h-wf63 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-xh99-hw7h-wf63
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification General Security Weakness
Affected Product Pocketmine/pocketmine mp
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix GHSA-xh99-hw7h-wf63

To remediate this vulnerability, upgrade all affected Pocketmine/pocketmine mp dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

pocketmine/pocketmine-mp fixed: 4.0.6 
Upgrade pocketmine/pocketmine-mp to 4.0.6
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for pocketmine/pocketmine-mp

How to Check if You Are Affected

To determine whether your application is affected by GHSA-xh99-hw7h-wf63, inspect your project dependencies for Pocketmine/pocketmine mp:

inspect dependencies for pocketmine/pocketmine-mp

Analyze the terminal output to locate any version of Pocketmine/pocketmine mp in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.0.6), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under General Security Weakness. In Pocketmine/pocketmine mp, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact A remote attacker may crash a server by sending `PlayerActionPacket` with invalid facing values (e.g. negative), specifically with `START_BREAK` or `CRACK_BLOCK` actions, or with a `UseItemTransactionData` (typically in `InventoryTransactionPacket`). ### Patches f126479c37ff00a717a828f5271cf8e821d12d6c ### Workarounds Using a plugin, cancel `DataPacketReceiveEvent` if the packet is `PlayerActionPacket` and the facing is outside the range 0-5 when receiving START_BREAK or CRACK_BLOCK actions, or UseItemTransactionData. However, beware that negative values may be legitimate in some cases. ### For more information If you have any questions or comments about this advisory: * Email us at [team@pmmp.io](mailto:team@pmmp.io)

GHSA-xh99-hw7h-wf63 Affected Pocketmine/pocketmine mp Versions

1 component(s)
Fixed Versions:
4.0.6
Product / Package Ecosystem Affected Versions Fixed Version
pocketmine/pocketmine-mp
 Packagist
< 4.0.6
4.0.6

References

GitHub Advisory / Wiki ADVISORY
https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-xh99-hw7h-wf63
Security Fix Commit FIX COMMIT
https://github.com/pmmp/PocketMine-MP/commit/f126479c37ff00a717a828f5271cf8e821d12d6c
Pocketmine/pocketmine mp Source Repository REPOSITORY
https://github.com/pmmp/PocketMine-MP

Frequently Asked Questions

What is GHSA-xh99-hw7h-wf63?
GHSA-xh99-hw7h-wf63 is a security vulnerability in Pocketmine/pocketmine mp involving Unchecked validity of Facing values in PlayerActionPacket under General Security Weakness.
Which Pocketmine/pocketmine mp versions are affected?
Affected versions include releases prior to 4.0.6 across affected packages: pocketmine/pocketmine-mp.
What version fixes GHSA-xh99-hw7h-wf63?
Upgrading to 4.0.6 (or the latest patched release for your respective branch) resolves the vulnerability.
Is pocketmine/pocketmine-mp affected?
Yes, pocketmine/pocketmine-mp is affected in releases prior to 4.0.6. Upgrade your dependency to 4.0.6 or later.
What is the CVSS score of GHSA-xh99-hw7h-wf63?
GHSA-xh99-hw7h-wf63 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with GHSA-xh99-hw7h-wf63?
GHSA-xh99-hw7h-wf63 is classified under General Security Weakness.
How can I check Packagist dependencies for GHSA-xh99-hw7h-wf63?
Run the dependency tree command: 'inspect dependencies for pocketmine/pocketmine-mp'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-xh99-hw7h-wf63",
  "modified" : "2025-12-26T17:30:07Z",
  "published" : "2022-01-13T22:25:44Z",
  "aliases" : [ ],
  "summary" : "Unchecked validity of Facing values in PlayerActionPacket",
  "details" : "### Impact\nA remote attacker may crash a server by sending `PlayerActionPacket` with invalid facing values (e.g. negative), specifically with `START_BREAK` or `CRACK_BLOCK` actions, or with a `UseItemTransactionData` (typically in `InventoryTransactionPacket`).\n\n### Patches\nf126479c37ff00a717a828f5271cf8e821d12d6c\n\n### Workarounds\nUsing a plugin, cancel `DataPacketReceiveEvent` if the packet is `PlayerActionPacket` and the facing is outside the range 0-5 when receiving START_BREAK or CRACK_BLOCK actions, or UseItemTransactionData. However, beware that negative values may be legitimate in some cases.\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Email us at [team@pmmp.io](mailto:team@pmmp.io)",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "pocketmine/pocketmine-mp"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.0.6"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-xh99-hw7h-wf63"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pmmp/PocketMine-MP/commit/f126479c37ff00a717a828f5271cf8e821d12d6c"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/pmmp/PocketMine-MP"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-01-13T22:08:36Z",
    "nvd_published_at" : null
  }
}