CVE-2022-21664
📋 TL;DR
CVE-2022-21664 is an SQL injection vulnerability in WordPress caused by insufficient input sanitization in a core class. This allows attackers to execute arbitrary SQL queries against the database. All WordPress sites running versions before 5.8.3 (and older versions back to 4.1.34) are affected.
💻 Affected Systems
- WordPress
📦 What is this software?
Fedora by Fedoraproject
Fedora by Fedoraproject
Wordpress by Wordpress
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise allowing data theft, modification, or deletion; potential privilege escalation to administrator access; possible remote code execution through database functions.
Likely Case
Data exfiltration of sensitive information (user credentials, personal data, content); database manipulation; potential site defacement.
If Mitigated
Limited impact with proper input validation and database user privilege restrictions; potential for error messages but no successful exploitation.
🎯 Exploit Status
Exploitation requires some WordPress knowledge but is well-documented in security advisories; authenticated access may be needed depending on attack vector.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: WordPress 5.8.3
Vendor Advisory: https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-jp3p-gw8h-6x86
Restart Required: No
Instructions:
1. Backup your WordPress site and database. 2. Update WordPress core to version 5.8.3 or later via Dashboard > Updates. 3. Verify update completed successfully. 4. Test site functionality.
🔧 Temporary Workarounds
No official workarounds
allThe vendor states there are no known workarounds for this vulnerability.
🧯 If You Can't Patch
- Implement strict web application firewall (WAF) rules to block SQL injection patterns
- 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 file for version number.Check Version:
grep '\$wp_version' wp-includes/version.phpVerify Fix Applied:
Confirm WordPress version is 5.8.3 or later; check that the patch commit c09ccfbc547d75b392dbccc1ef0b4442ccd3c957 is present in core files.📡 Detection & Monitoring
Log Indicators:
- Unusual database queries in WordPress debug logs
- SQL syntax errors in web server logs
- Multiple failed login attempts followed by unusual database activity
Network Indicators:
- HTTP requests containing SQL keywords (SELECT, UNION, INSERT, etc.) to WordPress endpoints
- Unusual database connection patterns from web server
SIEM Query:
source="*apache*" OR source="*nginx*" | search "wp-" AND ("SELECT" OR "UNION" OR "INSERT" OR "DELETE") AND status=200🔗 References
- https://github.com/WordPress/wordpress-develop/commit/c09ccfbc547d75b392dbccc1ef0b4442ccd3c957
- https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-jp3p-gw8h-6x86
- 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://github.com/WordPress/wordpress-develop/commit/c09ccfbc547d75b392dbccc1ef0b4442ccd3c957
- https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-jp3p-gw8h-6x86
- 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
