CVE-2020-28337

Name: CVE-2020-28337
Creator: NVD / NIST
Published: 2021-02-15T20:15:12.223+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.2/10EPSS 16.61%

Last modified Jun 17, 2026

CVE-2020-28337 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. 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.. EPSS estimates a 16.61% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.2/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

16.61%

96.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Microweber	Microweber	<= 1.1.20

References

http://packetstormsecurity.com/files/162514/Microweber-CMS-1.1.20-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
https://github.com/microweber/microweber/commit/777ee9c3e7519eb3672c79ac41066175b2001b50Patch, Third Party Advisory
https://sl1nki.page/advisories/CVE-2020-28337Third Party Advisory
https://sl1nki.page/blog/2021/02/01/microweber-zip-slipExploit, Patch, Third Party Advisory
http://packetstormsecurity.com/files/162514/Microweber-CMS-1.1.20-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
https://github.com/microweber/microweber/commit/777ee9c3e7519eb3672c79ac41066175b2001b50Patch, Third Party Advisory
https://sl1nki.page/advisories/CVE-2020-28337Third Party Advisory
https://sl1nki.page/blog/2021/02/01/microweber-zip-slipExploit, Patch, Third Party Advisory

Timeline

Published: Feb 15, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-28337?

How severe is CVE-2020-28337?

CVE-2020-28337 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 16.61% probability of exploitation in the next 30 days.

How do I fix CVE-2020-28337?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-28337?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST