CVE-2021-23520 json
Arbitrary File Write via Archive Extraction (Zip Slip)
published 2022-01-31 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-10487
- cvss
- 5.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.1%
- EPSS 1.1% chance of exploitation in 30 days, percentile 65%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- juce juce 6.1.5
- juce Debian 14, Debian 13, Debian 12 6.1.5~ds0-1
debian advisories DEBIAN-CVE-2021-23520
Exploit prediction
1.09% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
github.com
/juce-framework/JUCE/commit/2e874e80cba0152201aff6a4d0dc407997d10a7f
patch, third-party-advisory
-
snyk.io
/vuln/SNYK-UNMANAGED-JUCEFRAMEWORKJUCE-2388607
exploit, patch, third-party-advisory
-
snyk.io
/research/zip-slip-vulnerability
exploit, technical-description, third-party-advisory
Sources
- CVE List CVE-2021-23520
- NVD CVE-2021-23520
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.