CVE-2022-21661
📋 TL;DR
CVE-2022-21661 is an SQL injection vulnerability in WordPress's WP_Query class due to improper input sanitization. This allows attackers to execute arbitrary SQL commands through plugins or themes that use WP_Query in specific ways. All WordPress sites running versions before 5.8.3 are affected.
💻 Affected Systems
- WordPress
📦 What is this software?
Fedora by Fedoraproject
Fedora by Fedoraproject
Wordpress by Wordpress
Wordpress by Wordpress
Wordpress by Wordpress
Wordpress by Wordpress
Wordpress by Wordpress
Wordpress by Wordpress
Wordpress by Wordpress
Wordpress by Wordpress
Wordpress by Wordpress
Wordpress by Wordpress
Wordpress by Wordpress
Wordpress by Wordpress
Wordpress by Wordpress
Wordpress by Wordpress
Wordpress by Wordpress
Wordpress by Wordpress
Wordpress by Wordpress
Wordpress by Wordpress
Wordpress by Wordpress
Wordpress by Wordpress
Wordpress by Wordpress
Wordpress by Wordpress
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, privilege escalation, site defacement, or complete system takeover if database user has elevated privileges.
Likely Case
Data exfiltration from WordPress database including user credentials, sensitive content, and configuration data.
If Mitigated
Limited impact if proper input validation is implemented at application layer and database user has minimal privileges.
🎯 Exploit Status
Exploitation requires finding plugins/themes with specific WP_Query usage patterns. Public exploit code exists but requires adaptation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: WordPress 5.8.3
Vendor Advisory: https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-6676-cqfm-gw84
Restart Required: No
Instructions:
1. Backup your WordPress site and database. 2. Update WordPress to version 5.8.3 or later via Dashboard > Updates. 3. Update all plugins and themes. 4. Test site functionality after update.
🔧 Temporary Workarounds
No known workarounds
allThe vendor states there are no known workarounds for this vulnerability.
🧯 If You Can't Patch
- Implement strict WAF rules to block SQL injection patterns at the network perimeter
- Restrict database user permissions to minimum required privileges
🔍 How to Verify
Check if Vulnerable:
Check WordPress version in Dashboard > Updates or examine wp-includes/version.php fileCheck Version:
grep '\$wp_version' wp-includes/version.phpVerify Fix Applied:
Confirm WordPress version is 5.8.3 or later and verify the commit 17efac8c8ec64555eff5cf51a3eff81e06317214 is present📡 Detection & Monitoring
Log Indicators:
- Unusual database queries in WordPress logs
- Multiple failed login attempts followed by unusual SQL patterns
- Unexpected database errors in error logs
Network Indicators:
- HTTP requests with SQL injection patterns targeting WordPress endpoints
- Unusual database connection patterns from web server
SIEM Query:
source="wordpress.log" AND ("SQL syntax" OR "database error" OR "wpdb::prepare")🔗 References
- http://packetstormsecurity.com/files/165540/WordPress-Core-5.8.2-SQL-Injection.html
- https://github.com/WordPress/wordpress-develop/commit/17efac8c8ec64555eff5cf51a3eff81e06317214
- https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-6676-cqfm-gw84
- https://lists.debian.org/debian-lts-announce/2022/01/msg00019.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CV4UNEC63UU5GEU47IIR4RMTZAHNEOJG/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DM6XPH3JN6V4NF4WBOJTOXZIVE6VKKE3/
- https://wordpress.org/news/2022/01/wordpress-5-8-3-security-release/
- https://www.debian.org/security/2022/dsa-5039
- https://www.exploit-db.com/exploits/50663
- https://www.zerodayinitiative.com/advisories/ZDI-22-020/
- http://packetstormsecurity.com/files/165540/WordPress-Core-5.8.2-SQL-Injection.html
- https://github.com/WordPress/wordpress-develop/commit/17efac8c8ec64555eff5cf51a3eff81e06317214
- https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-6676-cqfm-gw84
- https://lists.debian.org/debian-lts-announce/2022/01/msg00019.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CV4UNEC63UU5GEU47IIR4RMTZAHNEOJG/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DM6XPH3JN6V4NF4WBOJTOXZIVE6VKKE3/
- https://wordpress.org/news/2022/01/wordpress-5-8-3-security-release/
- https://www.debian.org/security/2022/dsa-5039
- https://www.exploit-db.com/exploits/50663
- https://www.vicarius.io/vsociety/posts/understanding-the-wordpress-sql-injection-vulnerability-cve-2022-21661
- https://www.zerodayinitiative.com/advisories/ZDI-22-020/
