CVE-2020-28337

HIGH

Microweber < 1.1.20 - Authenticated Remote Code Execution via Backup Restore Path Traversal

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2020-28337. PoCs published by sl1nki.

AI-analyzed exploit summary This exploit leverages an authenticated RCE vulnerability in Microweber CMS by uploading a malicious ZIP file, moving it to the backup directory, and restoring it to achieve arbitrary PHP code execution. The payload is extracted to a predictable path due to unsafe ZIP extraction.

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.

Exploits (1)

exploitdb WORKING POC
by sl1nki · pythonwebappsphp
https://www.exploit-db.com/exploits/49856

This exploit leverages an authenticated RCE vulnerability in Microweber CMS by uploading a malicious ZIP file, moving it to the backup directory, and restoring it to achieve arbitrary PHP code execution. The payload is extracted to a predictable path due to unsafe ZIP extraction.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microweber CMS <= 1.1.20
Auth required
Prerequisites: Valid admin credentials · Access to the target's upload functionality
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Third Party Advisory x_refsource_misc
https://sl1nki.page/advisories/CVE-2020-28337
Exploit, Patch, Third Party Advisory x_refsource_misc
https://sl1nki.page/blog/2021/02/01/microweber-zip-slip

Scores

CVSS v3 7.2
EPSS 0.1381
EPSS Percentile 94.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-22
Status published
Products (2)
microweber/microweber < 1.1.20
microweber/microweber 0 - 1.2.3Packagist
Published Feb 15, 2021
Tracked Since Feb 18, 2026