What’s Vulnerable › Vulnerabilities

CVE-2021-23520: Arbitrary File Write via Archive Extraction (Zip Slip)

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-01-31 · updated 2026-06-17
• Weakness: CWE-22

Description

The package juce-framework/juce before 6.1.5 are vulnerable to Arbitrary File Write via Archive Extraction (Zip Slip) via the ZipFile::uncompressEntry function in juce_ZipFile.cpp. This vulnerability is triggered when the archive is extracted upon calling uncompressTo() on a ZipFile object.

Affected products

• Juce: before 6.1.5 — fixed in 6.1.5

How to fix

Upgrade to a fixed version: Juce 6.1.5. Check the vendor advisory for mitigations.

References

• https://github.com/juce-framework/JUCE/commit/2e874e80cba0152201aff6a4d0dc407997d10a7f
• https://snyk.io/research/zip-slip-vulnerability
• https://snyk.io/vuln/SNYK-UNMANAGED-JUCEFRAMEWORKJUCE-2388607
• https://github.com/juce-framework/JUCE/commit/2e874e80cba0152201aff6a4d0dc407997d10a7f
• https://snyk.io/research/zip-slip-vulnerability
• https://snyk.io/vuln/SNYK-UNMANAGED-JUCEFRAMEWORKJUCE-2388607

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