Zip slip in Microweber
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | microweber/microweber | < 1.2.3 | 1.2.3 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2020-28337
- 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
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-22- Platform
- Composer
- Package
microweber/microweber- Disclosed
- 10.02.2022
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-pqcf-v8v5-jmcg - CC BY 4.0
Vulnerability history: microweber/microweber
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 106
- First → latest
- 10.2021 06.2026
- Without a fix
- 31
- Exploited in attacks
- 0
Severity breakdown
- High 27
- Medium 73
- Low 6
Disclosures per year
- 2021: 1
- 2022: 71
- 2023: 19
- 2024: 3
- 2025: 9
- 2026: 3
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Zip slip in Microweber this entry
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