CVE-2023-6063
📋 TL;DR
This vulnerability allows unauthenticated attackers to execute arbitrary SQL commands on WordPress sites using WP Fastest Cache plugin versions before 1.2.2. Attackers can potentially read, modify, or delete database content, affecting all WordPress installations with the vulnerable plugin.
💻 Affected Systems
- WP Fastest Cache WordPress plugin
📦 What is this software?
Wp Fastest Cache by Wpfastestcache
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, privilege escalation, or site takeover
Likely Case
Data exfiltration, database manipulation, or denial of service
If Mitigated
Limited impact with proper input validation and database permissions
🎯 Exploit Status
WPScan has published technical details and proof-of-concept
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.2.2
Vendor Advisory: https://wordpress.org/plugins/wp-fastest-cache/#developers
Restart Required: No
Instructions:
1. Log into WordPress admin panel
2. Navigate to Plugins → Installed Plugins
3. Find WP Fastest Cache
4. Click 'Update Now' if available
5. Or download version 1.2.2+ from WordPress repository
6. Deactivate and delete old version
7. Upload and activate new version
🔧 Temporary Workarounds
Disable WP Fastest Cache
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate wp-fastest-cache
Web Application Firewall Rule
allBlock SQL injection attempts targeting WP Fastest Cache endpoints
🧯 If You Can't Patch
- Implement strict input validation and parameterized queries
- Restrict database user permissions to minimum required
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → WP Fastest Cache versionCheck Version:
wp plugin get wp-fastest-cache --field=versionVerify Fix Applied:
Confirm plugin version is 1.2.2 or higher📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple requests to wp-fastest-cache endpoints
Network Indicators:
- SQL injection patterns in HTTP requests
- Unusual database traffic
SIEM Query:
source="web_logs" AND uri="*wp-fastest-cache*" AND (query="*SELECT*" OR query="*UNION*" OR query="*OR 1=1*")🔗 References
- https://wpscan.com/blog/unauthenticated-sql-injection-vulnerability-addressed-in-wp-fastest-cache-1-2-2/
- https://wpscan.com/vulnerability/30a74105-8ade-4198-abe2-1c6f2967443e
- https://wpscan.com/blog/unauthenticated-sql-injection-vulnerability-addressed-in-wp-fastest-cache-1-2-2/
- https://wpscan.com/vulnerability/30a74105-8ade-4198-abe2-1c6f2967443e
