CVE-2025-12166
📋 TL;DR
This vulnerability allows unauthenticated attackers to perform blind SQL injection attacks on WordPress sites using the Simply Schedule Appointments Booking Plugin. Attackers can extract sensitive information from the database by manipulating the 'order' and 'append_where_sql' parameters. All WordPress sites using this plugin up to version 1.6.9.9 are affected.
💻 Affected Systems
- Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin for WordPress
⚠️ 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
Complete database compromise including user credentials, personal data, payment information, and administrative access leading to site takeover.
Likely Case
Extraction of sensitive user data, appointment details, and potentially administrative credentials from the database.
If Mitigated
Limited information disclosure if database permissions are properly restricted and sensitive data is encrypted.
🎯 Exploit Status
SQL injection vulnerabilities are commonly weaponized and this requires no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.6.10.0 or later
Vendor Advisory: https://plugins.trac.wordpress.org/changeset/3408539/
Restart Required: No
Instructions:
1. Log into WordPress admin panel
2. Navigate to Plugins → Installed Plugins
3. Find 'Simply Schedule Appointments'
4. Click 'Update Now' if available
5. If no update shows, download version 1.6.10.0+ from WordPress.org
6. Deactivate old plugin, upload new version, activate
🔧 Temporary Workarounds
Temporary Plugin Deactivation
allDisable the vulnerable plugin until patched
wp plugin deactivate simply-schedule-appointments
Web Application Firewall Rules
linuxBlock SQL injection patterns targeting the vulnerable parameters
ModSecurity rule: SecRule ARGS "(?i)(union|select|insert|update|delete|drop|--|#|\/\*|\*\/)" "id:1001,phase:2,deny,status:403,msg:'SQLi attempt'
🧯 If You Can't Patch
- Implement strict WAF rules to block SQL injection patterns
- Restrict database user permissions to read-only for the plugin
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Simply Schedule Appointments → Version numberCheck Version:
wp plugin get simply-schedule-appointments --field=versionVerify Fix Applied:
Verify plugin version is 1.6.10.0 or higher in WordPress admin📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple failed parameter requests with SQL keywords
- Requests to appointment endpoints with 'order' or 'append_where_sql' parameters containing SQL syntax
Network Indicators:
- HTTP POST/GET requests containing SQL injection payloads in parameters
- Unusual traffic patterns to appointment booking endpoints
SIEM Query:
source="web_logs" AND (url="*appointment*" AND (param="*order*" OR param="*append_where_sql*") AND (content="*union*" OR content="*select*" OR content="*--*" OR content="*#*"))