What’s Vulnerable › Vulnerabilities

CVE-2023-25305

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-04-04 · updated 2026-06-17
• Weakness: CWE-22

Description

PolyMC Launcher <= 1.4.3 is vulnerable to Directory Traversal. A mrpack file can be maliciously crafted to create arbitrary files outside of the installation directory.

Affected products

• Polymc: before 5.0 — fixed in 5.0

How to fix

Upgrade to a fixed version: Polymc 5.0. Check the vendor advisory for mitigations.

References

• https://github.com/PolyMC/PolyMC/security/advisories/GHSA-3rfr-g9g9-7gx2
• https://quiltmc.org/en/blog/2023-02-04-five-installer-vulnerabilities/
• https://github.com/PolyMC/PolyMC/security/advisories/GHSA-3rfr-g9g9-7gx2
• https://quiltmc.org/en/blog/2023-02-04-five-installer-vulnerabilities/

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