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Vulnerability record · CVE-2020-28337 · published 15 February 2021

CVE-2020-28337: Microweber path traversal vulnerability

Microweber · 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.

7.2 CVSS 3.1 High EPSS 17% · top 3.1% CWE-22 · Path traversal
7.2CVSS 3.1 base score, v2 6.5
17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 4 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/162514/Microweber-CMS-1.1.20-Remote-Code-Execution.html ExploitThird Party AdvisoryVDB Entry
https://github.com/microweber/microweber/commit/777ee9c3e7519eb3672c79ac41066175b2001b50 PatchThird Party Advisory
https://sl1nki.page/advisories/CVE-2020-28337 Third Party Advisory
https://sl1nki.page/blog/2021/02/01/microweber-zip-slip ExploitPatchThird Party Advisory
http://packetstormsecurity.com/files/162514/Microweber-CMS-1.1.20-Remote-Code-Execution.html ExploitThird Party AdvisoryVDB Entry
https://github.com/microweber/microweber/commit/777ee9c3e7519eb3672c79ac41066175b2001b50 PatchThird Party Advisory
https://sl1nki.page/advisories/CVE-2020-28337 Third Party Advisory
https://sl1nki.page/blog/2021/02/01/microweber-zip-slip ExploitPatchThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-1877Microweber command injection vulnerabilityCommand Injection in GitHub repository microweber/microweber prior to 1.3.3.EPSS 1.8%9.8CVE-2022-2368Microweber authentication bypass by spoofing vulnerabilityAuthentication Bypass by Spoofing in GitHub repository microweber/microweber prior to 1.2.20.EPSS 1.2%9.8CVE-2022-0895Microweber vulnerabilityStatic Code Injection in GitHub repository microweber/microweber prior to 1.3.EPSS 1.7%9.8CVE-2020-23138Microweber unrestricted file upload vulnerabilityAn unrestricted file upload vulnerability was discovered in the Microweber 1.1.18 admin account page. An attacker can upload PHP code or any extensio…EPSS 1.3%8.8CVE-2023-49052Microweber unrestricted file upload vulnerabilityFile Upload vulnerability in Microweber v.2.0.4 allows a remote attacker to execute arbitrary code via a crafted script to the file upload function i…EPSS 2.4%8.8CVE-2023-2240Microweber improper privilege management vulnerabilityImproper Privilege Management in GitHub repository microweber/microweber prior to 1.3.4.EPSS 0.71%8.8CVE-2022-33012Microweber injection vulnerabilityMicroweber v1.2.15 was discovered to allow attackers to perform an account takeover via a host header injection attack.EPSS 1.4%8.8CVE-2021-36461Microweber unrestricted file upload vulnerabilityAn Arbitrary File Upload vulnerability exists in Microweber 1.1.3 that allows attackers to getshell via the Settings Upload Picture section by upload…EPSS 0.92%

Source: NIST National Vulnerability Database (record CVE-2020-28337), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.