CVE-2025-55471
📋 TL;DR
An incorrect access control vulnerability in youlai-boot v2.21.1 allows attackers to bypass authorization checks in the getUserFormData function, enabling unauthorized access to sensitive user information. This affects all deployments running the vulnerable version of the youlai-boot framework. Attackers can exploit this to retrieve other users' personal data without proper authentication.
💻 Affected Systems
- youlai-boot
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Mass data breach exposing all user records including personally identifiable information, credentials, or sensitive form data stored in the system.
Likely Case
Targeted data extraction of specific users' information leading to privacy violations and potential credential harvesting.
If Mitigated
Unauthorized access attempts are logged and blocked, with no data exposure beyond what's permitted by proper access controls.
🎯 Exploit Status
Exploitation requires some authentication but bypasses authorization checks. Public GitHub gist demonstrates the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v2.21.2 or later
Vendor Advisory: https://gitee.com/youlaiorg/youlai-boot/issues/ICFBW8
Restart Required: Yes
Instructions:
1. Update youlai-boot to version 2.21.2 or later. 2. Review and test the getUserFormData function implementation. 3. Restart the application server.
🔧 Temporary Workarounds
Implement additional authorization middleware
allAdd server-side authorization checks before getUserFormData function execution
# Add authorization check in controller/service layer
# Example: if (!currentUser.hasAccess(targetUserId)) { return unauthorized(); }
🧯 If You Can't Patch
- Implement network-level access controls to restrict access to the vulnerable endpoint
- Enable detailed logging and monitoring for unauthorized access attempts to the getUserFormData function
🔍 How to Verify
Check if Vulnerable:
Check if youlai-boot version is 2.21.1 and if getUserFormData function lacks proper user ID validationCheck Version:
Check application.properties or pom.xml for youlai-boot versionVerify Fix Applied:
Test that authenticated users cannot access other users' data through the getUserFormData endpoint📡 Detection & Monitoring
Log Indicators:
- Multiple getUserFormData requests with different user IDs from same session
- Access denied logs for getUserFormData function
Network Indicators:
- Unusual pattern of requests to user data endpoints
- Requests with manipulated user ID parameters
SIEM Query:
source="application.logs" AND "getUserFormData" AND (user_id_mismatch OR unauthorized_access)