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NVD / CVE Program· CNA VulnCheck

CVE-2022-51017: PocketMine-MP before 3.26.5 and 4.0.5 Denial of Service via Skin Data

Noroxi assessment

Priority: Monitor (action score 34/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.63% (FIRST EPSS); higher than 50.1% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: pmmp PocketMine-MP 3.26.5, 4.0.5.

Low priority for now. Upgrade to pmmp PocketMine-MP 3.26.5, 4.0.5 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

PocketMine-MP versions before 3.26.5 and 4.0.5 fail to validate the length of skin data fields submitted by players, allowing uncapped values to exceed the 32767 byte TAG_String limit. Attackers can submit oversized skin data fields like skinID or geometryName to trigger exceptions during NBT data serialization, causing server crashes.

HighCVSS 8.7 · v4.0—No exploit Fix available
Published
Sep 7, 2026
Updated
Oct 8, 2026
EPSS
0.6% · 50th percentile

Report tools

JSON

Action score

34

Monitor

Low priority for now.

CVSS
34 / 40 · 8.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.6%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · VulnCheck
8.7
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2022-51017

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulnCheck). Independent of NVD's CPE analysis and usually ahead of it.

  • pmmp PocketMine-MP

    • 3.26.5, 4.0.5not affected
    • 3.0.0 and later · before 3.26.5affected · semver
    • 4.0.0 and later · before 4.0.5affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Packagistpocketmine/pocketmine-mpfrom 4.0.0 · before 4.0.54.0.5
Packagistpocketmine/pocketmine-mpbefore 3.26.53.26.5

Same product

pmmp: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-86201PocketMine-MP before 5.41.1 LogDoS via LoginPacket clientData
    34Monitor
  • CVE-2024-58381PocketMine-MP before 5.11.1 Denial of Service via LoginPacket
    34Monitor
  • CVE-2023-54393PocketMine-MP before 4.20.5 Denial of Service via LoginPacket
    34Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2022-51015Sep 7, 2026 · PocketMine-MP before 4.0.6 Denial of Service via PlayerActionPacket
    28Monitor
  • ← EarlierCVE-2022-51016Sep 7, 2026 · PocketMine-MP 3.x before 3.27.0 Authentication Bypass via Login Replay
    21Monitor
  • Later →CVE-2022-51018Sep 7, 2026 · PocketMine-MP before 3.26.5 and 4.0.5 Input Validation via Book Pages
    28Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
pmmp PocketMine-MP3.26.5Vendor (CNA)
pmmp PocketMine-MP4.0.5Vendor (CNA)
Packagist:pocketmine/pocketmine-mp3.26.5Package registry (OSV)
Packagist:pocketmine/pocketmine-mp4.0.5Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2023-543932 days apartPocketMine-MP before 4.20.5 Denial of Service via LoginPacket
    34Monitor
  • CVE-2022-510100 days apartPocketMine-MP before 4.4.2 Server Crash via Item ID
    28Monitor
  • CVE-2022-510120 days apartPocketMine-MP before 4.2.9 Denial of Service via NBT Deserialization
    28Monitor
  • CVE-2022-510130 days apartPocketMine-MP before 4.2.3 Denial of Service via NBT Metadata
    28Monitor
  • CVE-2022-510150 days apartPocketMine-MP before 4.0.6 Denial of Service via PlayerActionPacket
    28Monitor
  • CVE-2021-480071 days apartPocketMine-MP before 3.18.1 Denial of Service via MovePlayerPacket
    28Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-20 · Improper Input Validation

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records