Improper Limitation of a Pathname to a Restricted Directory in Zip4j

published 2018-07-25 8 y ago modified 2026-06-17 4 mo ago also GHSA-2rpm-4x8c-pvqg , EUVD-2022-2044

cvss: 6.5; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 12.6%; EPSS 12.6% chance of exploitation in 30 days, percentile 96%
public exploits: 0; none known

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'.

Patch / fix

fixed in 2 links 1

maven net.lingala.zip4j:zip4j 1.3.3
zip4j zip4j 1.3.3

snyk.io/research/zip-slip-vulnerability advisory

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-1002202 updated 2025-11-21 cvss 6.3

zip4j: arbitrary file write vulnerability / arbitrary code execution using a specially crafted zip file

Red Hat JBoss Developer Studio 11 zip4j zip4j Red Hat JBoss Data Virtualization 6 zip4j zip4j
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

12.64% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

snyk.io https://snyk.io/research/zip-slip-vulnerability referenced PoC, tagged "exploit" by a source, unverified
github.com https://github.com/snyk/zip-slip-vulnerability referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	6.5	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
NVD	2.0	5.8	AV:N/AC:M/Au:N/C:N/I:P/A:P
GitHub	3.0	6.5	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Affected packages

ecosystem	package	affected	fixed in
maven	net.lingala.zip4j:zip4j	<1.3.3	1.3.3

Affected products

zip4j zip4j

Classification

Weakness

CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

snyk.io /research/zip-slip-vulnerability
web, exploit, issue-tracking, patch, third-party-advisory
github.com /snyk/zip-slip-vulnerability
web, exploit, third-party-advisory
support.hpe.com /hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbmu03895en_us
web, third-party-advisory
snyk.io /vuln/SNYK-JAVA-NETLINGALAZIP4J-31679
web, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2018-1002202
advisory

Sources

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.

Summary