Skip to content
Patch Next
Sign inAdd to your agent

← Actionable
Medium, CVSS 5.3

PocketMine-MP vulnerable to denial-of-service by sending large modal form responses

GHSA-7m9r-rq9j-wmmh

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (pocketmine/pocketmine-mp 4.12.5), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

Add to your agent

Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
5.3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

Impact Due to a workaround for an old client bug (which has since been fixed), very large JSON payloads in ModalFormResponsePacket were able to cause the server to spend a significant amount of time processing the packet. Large numbers of these packets were able to hog CPU time so as to prevent the server from processing other connections in a timely manner. Patches The problem has been addressed in 3baa5ab71214f96e6e7ab12cb9beef08118473b5 by removing the workaround code. Workarounds Plugins could cancel DataPacketReceiveEvent for this packet, decode the data their way, and then call Player-onFormSubmit() directly, bypassing the vulnerable code.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-7m9r-rq9j-wmmh

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: GHSA-7m9r-rq9j-wmmh

Advisory: PocketMine-MP vulnerable to denial-of-service by sending large modal form responses
IDs: GHSA-7m9r-rq9j-wmmh
Record: https://patchnext.com/advisories/ghsa-7m9r-rq9j-wmmh (revision 1, source checked 26 Oct 2026, 13:56 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: pocketmine/pocketmine-mp 4.12.5. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist pocketmine/pocketmine-mp: affected < 4.12.5; fixed in 4.12.5

## Suggested inspection (read-only)
- Packagist pocketmine/pocketmine-mp: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on pocketmine/pocketmine-mp.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-7m9r-rq9j-wmmh (GitHub-reviewed advisory GHSA-7m9r-rq9j-wmmh lists affected ranges: Packagist pocketmine/pocketmine-mp >=0 <4.12.5)

Commands are suggestions: review each one before running it.

Loading voting…