CVE-2018-1002203
Arbitrary File Write via Archive Extraction in unzipper
unzipper npm library before 0.8.13 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'.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
unzipper npm library before 0.8.13 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'.
- Record
CVE-2018-1002203- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
CVE List No score
unzipper npm library before 0.8.13 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'.
- Record
CVE-2018-1002203- Weakness
- CWE-22
- Updated
- 2026-11-02
EUVDEUVD-2018-0248 No score
unzipper npm library before 0.8.13 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'.
- Record
EUVD-2018-0248- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-884w-698f-927f
Arbitrary File Write via Archive Extraction in unzipper
Versions of unzipper before 0.8.13 are vulnerable to arbitrary file write when used to extract a specifically crafted archive that contains path traversal filenames (../../file.txt for example).
Recommendation
Update to version 0.3.18 or later.
- Record
GHSA-884w-698f-927f- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
OSV
unzipper npm library before 0.8.13 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'.
- Record
CVE-2018-1002203- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
OSVGHSA-884w-698f-927f
Arbitrary File Write via Archive Extraction in unzipper
Versions of unzipper before 0.8.13 are vulnerable to arbitrary file write when used to extract a specifically crafted archive that contains path traversal filenames (../../file.txt for example).
Recommendation
Update to version 0.3.18 or later.
- Record
GHSA-884w-698f-927f- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
unzippernpm |
before 0.8.13 | 0.8.13 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-1002203 is a medium vulnerability (CVSS 5.5) in Node.js Unzipper, published July 25, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 10.6%, the 95th percentile. Fixed in unzipper 0.8.13.
References
snyk.io/research/zip-slip-vulnerability
github.com/ZJONSSON/node-unzipper/commit/2220ddd5b58f6252069a4f99f9475441ad0b50cd
nvd.nist.gov/vuln/detail/CVE-2018-1002203
hackerone.com/reports/362119
npmjs.com/advisories/680