CVE-2025-41112
📋 TL;DR
An authorization bypass vulnerability in CanalDenuncia.app allows attackers to access other users' confidential information by manipulating the 'web' parameter in a POST request to '/backend/api/buscarConfiguracionParametros2.php'. This affects all users of vulnerable CanalDenuncia.app installations who rely on the platform for secure reporting.
💻 Affected Systems
- CanalDenuncia.app
📦 What is this software?
Canaldenuncia.app by Canaldenuncia
⚠️ Risk & Real-World Impact
Worst Case
Mass data breach exposing all user reports, whistleblower identities, and sensitive organizational data, leading to legal liability, regulatory fines, and reputational damage.
Likely Case
Targeted extraction of specific users' confidential reports and personal information, potentially enabling blackmail, corporate espionage, or retaliation against whistleblowers.
If Mitigated
Limited exposure if proper authentication and authorization checks are implemented, restricting access to only authorized users' data.
🎯 Exploit Status
Exploitation requires sending crafted POST requests but no authentication needed for the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown specific version
Vendor Advisory: https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-canaldenunciaapp
Restart Required: Yes
Instructions:
1. Contact CanalDenuncia.app vendor for patched version
2. Apply vendor-provided security update
3. Restart application services
4. Verify authorization checks are properly implemented
🔧 Temporary Workarounds
Web Application Firewall Rule
allBlock or monitor POST requests to the vulnerable endpoint with suspicious 'web' parameter values
WAF-specific configuration required
Endpoint Restriction
linuxTemporarily restrict access to '/backend/api/buscarConfiguracionParametros2.php' endpoint
# Apache: RewriteRule ^/backend/api/buscarConfiguracionParametros2\.php$ - [F]
# Nginx: location ~* /backend/api/buscarConfiguracionParametros2\.php { deny all; }
🧯 If You Can't Patch
- Implement strict authentication and authorization middleware for all API endpoints
- Deploy network segmentation to isolate the application from sensitive data stores
🔍 How to Verify
Check if Vulnerable:
Send POST request to '/backend/api/buscarConfiguracionParametros2.php' with manipulated 'web' parameter and check if unauthorized data is returnedCheck Version:
Check application version through admin interface or contact vendorVerify Fix Applied:
Test same exploit attempt after patch - should receive authorization error or no data📡 Detection & Monitoring
Log Indicators:
- Multiple POST requests to '/backend/api/buscarConfiguracionParametros2.php' with varying 'web' parameter values
- Unusual data access patterns from single IP addresses
Network Indicators:
- POST requests to vulnerable endpoint with parameter manipulation
- Unusual outbound data transfers following exploitation attempts
SIEM Query:
source="web_logs" AND uri_path="/backend/api/buscarConfiguracionParametros2.php" AND http_method="POST" AND parameter="web" AND (user_agent="*scanner*" OR src_ip_count>10)