CVE-2025-71417Public exploitNetwork attack vector

Authenticated server crash via duplicate pack UUIDs

Published Sep 9, 2026 · Updated Sep 10, 2026

Improper input validation in PMMP PocketMine-MP before 5.32.1 allows remote authenticated users to crash the server via duplicate pack UUIDs. The STATUS_SEND_PACKS handler iterates the client-controlled packIds array without enforcing uniqueness and transmits a pack again for every repeated valid UUID. Exploitation requires resource packs to be enabled and a nonstandard authenticated client; repeated transmissions exhaust memory and freeze or crash the server.

CVSS severity6.5
Medium
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in PMMP PocketMine-MP before 5.32.1 allows remote authenticated users to crash the server via duplicate pack UUIDs. The STATUS_SEND_PACKS handler iterates the client-controlled packIds array without enforcing uniqueness and transmits a pack again for every repeated valid UUID. Exploitation requires resource packs to be enabled and a nonstandard authenticated client; repeated transmissions exhaust memory and freeze or crash the server.

The record

CVE
CVE-2025-71417
Published
Sep 9, 2026
Updated
Sep 10, 2026
Vendor
PMMP
Product
PocketMine-MP
Classifications
CWE-20, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <5.32.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

PMMP · PocketMine-MPversion=0 <5.32.1

Published CVSS scores

7.1GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
6.5VulnCheck CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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