CVE-2023-51327
📋 TL;DR
This vulnerability allows attackers to send excessive password reset emails to legitimate users by exploiting missing rate limiting in the Forgot Password feature. This can lead to denial of service through email flooding. All installations of PHPJabbers Cleaning Business Software v1.0 are affected.
💻 Affected Systems
- PHPJabbers Cleaning Business Software
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Email server overload causing service disruption, legitimate users locked out of accounts, and potential reputational damage from spam-like behavior.
Likely Case
Targeted users receive hundreds of password reset emails, causing inbox flooding and temporary service disruption for affected individuals.
If Mitigated
Minimal impact with proper rate limiting and email monitoring in place.
🎯 Exploit Status
Simple HTTP POST requests to the forgot password endpoint can trigger this vulnerability without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Consider implementing custom rate limiting or upgrading if newer versions exist.
🔧 Temporary Workarounds
Implement Web Application Firewall (WAF) Rules
allConfigure WAF to limit requests to the forgot password endpoint
Depends on specific WAF platform
Custom Rate Limiting Implementation
allAdd rate limiting logic to the forgot password PHP script
Modify PHP code to track requests per IP/user and enforce limits
🧯 If You Can't Patch
- Implement network-level rate limiting at the firewall or load balancer
- Monitor email server logs for unusual password reset activity patterns
🔍 How to Verify
Check if Vulnerable:
Test by sending multiple consecutive POST requests to the forgot password endpoint from the same IP addressCheck Version:
Check software version in admin panel or readme filesVerify Fix Applied:
Verify that after implementing rate limiting, multiple rapid password reset requests are blocked or delayed📡 Detection & Monitoring
Log Indicators:
- Multiple password reset requests from same IP in short timeframe
- Unusual spike in email sending activity
Network Indicators:
- High volume of POST requests to /forgot-password or similar endpoints
SIEM Query:
source=web_logs method=POST uri=*forgot* | stats count by src_ip | where count > 10