CVE-2023-1877
📋 TL;DR
This CVE describes a command injection vulnerability in Microweber CMS versions prior to 1.3.3. Attackers can execute arbitrary operating system commands on the server by injecting malicious input into vulnerable parameters. All Microweber installations running affected versions are vulnerable to this high-severity attack.
💻 Affected Systems
- Microweber CMS
📦 What is this software?
Microweber by Microweber
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attackers to execute arbitrary commands with web server privileges, potentially leading to data theft, ransomware deployment, or complete server takeover.
Likely Case
Remote code execution leading to website defacement, data exfiltration, or installation of backdoors for persistent access.
If Mitigated
Limited impact if proper input validation and command sanitization are implemented, potentially reducing to denial of service or limited information disclosure.
🎯 Exploit Status
The vulnerability is publicly documented with proof-of-concept available. Exploitation requires minimal technical skill due to the nature of command injection vulnerabilities.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.3.3 and later
Vendor Advisory: https://github.com/microweber/microweber/commit/93a906d0bf096c3ab1674012a90c88d101e76c8d
Restart Required: No
Instructions:
1. Backup your Microweber installation and database. 2. Update to Microweber version 1.3.3 or later via the admin panel or manual update. 3. Verify the update completed successfully.
🔧 Temporary Workarounds
Input Validation Filter
allImplement strict input validation to filter shell metacharacters from user inputs
Not applicable - requires code modification
WAF Rule Implementation
allDeploy web application firewall rules to block command injection patterns
Not applicable - WAF configuration required
🧯 If You Can't Patch
- Implement strict network segmentation to isolate the vulnerable system
- Deploy application-level controls to monitor and block suspicious command execution attempts
🔍 How to Verify
Check if Vulnerable:
Check the Microweber version in the admin panel or by examining the composer.json file for version <1.3.3Check Version:
Check admin panel or examine composer.json for version numberVerify Fix Applied:
Verify the version is 1.3.3 or later and check that the vulnerable code has been patched in the commit referenced in the advisory📡 Detection & Monitoring
Log Indicators:
- Unusual system commands in web server logs
- Suspicious process execution from web user context
- Multiple failed command injection attempts
Network Indicators:
- Unexpected outbound connections from web server
- Traffic to known malicious IPs or domains
SIEM Query:
source="web_server" AND (command="*;*" OR command="*|*" OR command="*`*" OR command="*$(*")🔗 References
- https://github.com/microweber/microweber/commit/93a906d0bf096c3ab1674012a90c88d101e76c8d
- https://huntr.dev/bounties/71fe4b3b-20ac-448c-8191-7b99d7ffaf55
- https://github.com/microweber/microweber/commit/93a906d0bf096c3ab1674012a90c88d101e76c8d
- https://huntr.dev/bounties/71fe4b3b-20ac-448c-8191-7b99d7ffaf55
