PocketMine-MP vulnerable to denial-of-service by sending large modal form responses
Key facts
- Attack vector
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- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
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- Confidentiality · integrity · availability
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- Fix status
- Fixed
No CVSS vector from any source. Fix status from GitHub.
Summary
### 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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | pocketmine/pocketmine-mp (Packagist) | before 4.12.5 | 4.12.5 | Patch available | GHSA-7m9r-rq9j-wmmh |
- pocketmine/pocketmine-mp (Packagist) Vendor— Affected before 4.12.5 Fixed in 4.12.5 Patch available GHSA-7m9r-rq9j-wmmh
Remediation
- Fix · GHSA-7m9r-rq9j-wmmh pocketmine/pocketmine-mp (Packagist) Fixed in 4.12.5 Advisory →
Timeline
- 2026-10-03 Threatist record created from GHSA-7m9r-rq9j-wmmh
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences