CVE-2020-28337

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 16.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-02-15 · updated 2026-06-17
Weakness: CWE-22

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.

Affected products

microweber/microweber: through 1.1.20

References

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

Get alerted when CVE-2020-28337 or the next vulnerability affects your stack