CVE-2022-51013
mediumpriority · track · 26EPSS 0.005 · 45 %ileUSEPSS · scored 2026-10-25
PocketMine-MP versions before 4.2.3 fail to validate damage metadata values in tool and armor item NBT data received from clients. Attackers can send negative or out-of-range damage values in itemstack NBT to trigger unhandled exceptions in the Durable class, causing server crashes.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.9–7.5
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (1)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-46c5-pfj8-fv65Improperly checked metadata on tools/armour itemstacks received from the client2022-03-18ghsa · osvUS
### Impact Due to a workaround applied in 1.13, an attacker may send a negative damage/meta value in a tool or armour item's NBT, which `TypeConverter` then blindly uses as if it was valid without being checked. When this invalid metadata value reaches `Durable->setDamage()`, an exception is thrown because the metadata is not within the expected range for damage values. This can be reproduced with either a too-large damage value, or a negative one. ### Patches c8e1cfcbee4945fd4b63d2a7e96025c59744d4f1 ### Workarounds In theory this can be checked by plugins using a custom `TypeConverter`, but this is likely to be very cumbersome. ### For more information * Email us at [team@pmmp.io](mailto:team@pmmp.io)
sources
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references (3) nvd
External citations — patches, advisories, analysis.
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