CVE-2021-48007 PocketMine-MP before 3.18.1 Denial of Service via MovePlayerPacket
Attackers can crash PocketMine-MP servers or disrupt client rendering by sending crafted movement packets with invalid floating-point values.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-48007?
CVE-2021-48007 is a high-severity denial of service vulnerability in pmmp PocketMine-MP, published on 6 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
PocketMine-MP versions before 3.18.1 fail to validate NaN or INF values in MovePlayerPacket position and rotation fields. Malicious clients can send crafted movement packets with invalid floating-point values to crash servers through unhandled mathematical operations or prevent clients from rendering other players.
Weakness: CWE-20
Which versions are affected by CVE-2021-48007?
2 open source packages ship an affected version, including pocketmine/pocketmine-mp.
| Package | Affected | Fixed in |
|---|---|---|
pocketmine/pocketmine-mp Packagist | All versions | 3.18.1 |
pocketmine/pocketmine-mp Packagist | All versions | 3.18.1 |
How do I fix CVE-2021-48007?
Upgrade pocketmine/pocketmine-mp to 3.18.1 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-48007 being exploited?
There is no known exploitation of CVE-2021-48007 in the wild and no public exploit code.
Sources
Also known as GHSA-556r-f58w-q4pf, GHSA-fm35-jgg3-3grx.