CVE-2023-51544
📋 TL;DR
This vulnerability in the RegistrationMagic WordPress plugin allows attackers to bypass form submission limits, enabling functionality misuse. It affects all WordPress sites using RegistrationMagic versions up to 5.2.5.0. Attackers could submit forms more frequently than intended, potentially overwhelming systems or bypassing intended restrictions.
💻 Affected Systems
- RegistrationMagic WordPress Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could overwhelm the WordPress site with excessive form submissions, causing denial of service, resource exhaustion, or bypassing rate limits to spam registration systems.
Likely Case
Spammers or malicious users bypass submission limits to flood forms, potentially overwhelming administrators with unwanted submissions or bypassing intended usage restrictions.
If Mitigated
With proper rate limiting at the web server or application firewall level, impact is limited to minor inconvenience or failed attempts.
🎯 Exploit Status
Exploitation requires no authentication and is simple to execute via HTTP requests.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.2.5.1 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find RegistrationMagic and click 'Update Now'. 4. Verify version is 5.2.5.1 or higher.
🔧 Temporary Workarounds
Web Application Firewall Rate Limiting
allImplement rate limiting at the WAF or web server level to restrict form submission frequency.
Temporary Plugin Deactivation
linuxDisable RegistrationMagic plugin until patched if form functionality is not critical.
wp plugin deactivate custom-registration-form-builder-with-submission-manager
🧯 If You Can't Patch
- Implement strict rate limiting at the web server or CDN level for all form submission endpoints.
- Monitor form submission logs for abnormal patterns and implement alerting for excessive submissions.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for RegistrationMagic version. If version is 5.2.5.0 or lower, you are vulnerable.Check Version:
wp plugin get custom-registration-form-builder-with-submission-manager --field=versionVerify Fix Applied:
After updating, verify RegistrationMagic version shows 5.2.5.1 or higher in WordPress admin plugins page.📡 Detection & Monitoring
Log Indicators:
- Unusually high frequency of POST requests to RegistrationMagic form endpoints
- Multiple form submissions from same IP in short timeframes
Network Indicators:
- High volume of HTTP POST requests to /wp-content/plugins/custom-registration-form-builder-with-submission-manager/ endpoints
SIEM Query:
source="web_server_logs" AND (uri_path="*custom-registration-form-builder-with-submission-manager*" OR user_agent="*RegistrationMagic*") | stats count by src_ip, uri_path | where count > 100🔗 References
- https://patchstack.com/database/vulnerability/custom-registration-form-builder-with-submission-manager/wordpress-registrationmagic-plugin-5-2-5-0-form-submission-limit-bypass-vulnerability?_s_id=cve
- https://patchstack.com/database/vulnerability/custom-registration-form-builder-with-submission-manager/wordpress-registrationmagic-plugin-5-2-5-0-form-submission-limit-bypass-vulnerability?_s_id=cve
