CVE-2021-47872
📋 TL;DR
SEO Panel versions before 4.9.0 contain a blind SQL injection vulnerability in the archive.php page. Authenticated attackers can inject malicious SQL code through the 'order_col' parameter to extract database information. This affects all SEO Panel installations running vulnerable versions.
💻 Affected Systems
- SEO Panel
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers could extract sensitive database information including user credentials, configuration data, and potentially gain administrative access to the system.
Likely Case
Attackers with valid credentials can extract database contents, potentially accessing user data, SEO configurations, and other sensitive information stored in the database.
If Mitigated
With proper input validation and parameterized queries, SQL injection attempts would be blocked and no data would be exposed.
🎯 Exploit Status
Exploit code is publicly available and can be automated with tools like sqlmap. Requires valid user credentials.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.9.0
Vendor Advisory: https://github.com/seopanel/Seo-Panel/releases/tag/4.9.0
Restart Required: No
Instructions:
1. Backup your current SEO Panel installation and database. 2. Download SEO Panel 4.9.0 or later from the official website. 3. Replace the vulnerable files with the patched version. 4. Verify the installation is working correctly.
🔧 Temporary Workarounds
Input Validation Filter
allAdd input validation to sanitize the order_col parameter before processing
Modify archive.php to validate order_col parameter against allowed column names
Web Application Firewall Rule
allBlock SQL injection patterns in order_col parameter
Add WAF rule to detect and block SQL injection attempts in order_col parameter
🧯 If You Can't Patch
- Implement strict input validation for the order_col parameter in archive.php
- Restrict access to archive.php page to only trusted users or IP addresses
🔍 How to Verify
Check if Vulnerable:
Check if your SEO Panel version is below 4.9.0 by examining the version file or admin panelCheck Version:
Check includes/version.php file or login to admin panel and check version in footerVerify Fix Applied:
Verify installation is running version 4.9.0 or later and test the archive.php page with SQL injection test payloads📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple failed login attempts followed by archive.php access
- Long or unusual order_col parameter values in web server logs
Network Indicators:
- SQL injection patterns in HTTP requests to archive.php
- Unusual database query patterns from web server
SIEM Query:
source="web_server" AND uri="/archive.php" AND (order_col CONTAINS "UNION" OR order_col CONTAINS "SELECT" OR order_col CONTAINS "--" OR order_col CONTAINS "'" OR order_col CONTAINS ";")