CVE-2023-25306Network attack vector

Arbitrary file creation via crafted modpack paths

Published Jun 26, 2023 · Updated Dec 4, 2024

Path traversal in MultiMC Launcher 0.6.16 and earlier allows attackers to escape an instance directory through crafted .mrpack import paths. The .mrpack installer fails to confine manifest-supplied file paths to the new instance directory, permitting file creation elsewhere. Importing an attacker-controlled modpack is required, after which content can create or overwrite files writable by the launcher process.

CVSS severity7.5
High
EPSS probability1.06%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in MultiMC Launcher 0.6.16 and earlier allows attackers to escape an instance directory through crafted .mrpack import paths. The .mrpack installer fails to confine manifest-supplied file paths to the new instance directory, permitting file creation elsewhere. Importing an attacker-controlled modpack is required, after which content can create or overwrite files writable by the launcher process.

The record

CVE
CVE-2023-25306
Published
Jun 26, 2023
Updated
Dec 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-22, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

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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