CVE-2025-40619
📋 TL;DR
Bookgy contains an authorization bypass vulnerability (CWE-863) that allows unauthenticated attackers to access private areas or functionality intended for other user roles. This affects all Bookgy installations with the vulnerable code, potentially exposing sensitive data or administrative functions.
💻 Affected Systems
- Bookgy
📦 What is this software?
Bookgy by Bookgy
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through unauthorized access to administrative functions, data exfiltration of all user information, or privilege escalation to full system control.
Likely Case
Unauthorized access to user data, manipulation of application content, or access to functionality intended for authenticated users only.
If Mitigated
Proper authorization controls prevent unauthorized access, limiting users to their intended roles and protecting sensitive areas.
🎯 Exploit Status
The vulnerability allows unauthenticated access, making exploitation straightforward once the vulnerable endpoints are identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific version
Vendor Advisory: https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-bookgy
Restart Required: Yes
Instructions:
1. Review the vendor advisory at the provided URL
2. Download and apply the latest Bookgy patch
3. Restart the Bookgy application
4. Verify authorization controls are functioning correctly
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict network access to Bookgy application to trusted IPs only
iptables -A INPUT -p tcp --dport [BOOKGY_PORT] -s [TRUSTED_IP] -j ACCEPT
iptables -A INPUT -p tcp --dport [BOOKGY_PORT] -j DROP
Web Application Firewall Rules
allImplement WAF rules to block unauthorized access patterns
🧯 If You Can't Patch
- Implement strict network segmentation and access controls
- Deploy a web application firewall with authorization bypass detection rules
🔍 How to Verify
Check if Vulnerable:
Test if unauthenticated requests can access endpoints that should require authentication or specific rolesCheck Version:
Check Bookgy application version in admin panel or configuration filesVerify Fix Applied:
Verify that unauthenticated requests to protected endpoints now return proper authorization errors (401/403)📡 Detection & Monitoring
Log Indicators:
- Multiple 200/302 responses to protected endpoints from unauthenticated users
- Access to admin/private URLs without authentication logs
- Unusual access patterns to role-specific functionality
Network Indicators:
- HTTP requests to protected endpoints without authentication headers
- Direct access to API endpoints that should require specific roles
SIEM Query:
source="bookgy_logs" AND (status=200 OR status=302) AND (uri CONTAINS "/admin/" OR uri CONTAINS "/private/") AND NOT auth_token EXISTS