zip4j before 1.3.3 is vulnerable to directory traversal, allowing attackers to write to arbitrary files via a ../ (dot dot slash) in a Zip archive entry that is mishandled during extraction. This vulnerability is also known as 'Zip-Slip'.
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbmu03895en_us
https://snyk.io/vuln/SNYK-JAVA-NETLINGALAZIP4J-31679
https://snyk.io/research/zip-slip-vulnerability
https://github.com/snyk/zip-slip-vulnerability
Source: Mitre, NVD
Published: 2018-07-25
Updated: 2026-06-17
Base Score: 5.8
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:P
Severity: Medium
Base Score: 6.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
EPSS: 0.06635