CVE-2025-11750
📋 TL;DR
This vulnerability allows attackers to determine whether specific user accounts exist in langgenius/dify-web systems by analyzing authentication error messages. Attackers can use this information to facilitate targeted attacks like credential stuffing or social engineering. All deployments of langgenius/dify-web version 1.6.0 are affected.
💻 Affected Systems
- langgenius/dify-web
📦 What is this software?
Dify by Langgenius
⚠️ Risk & Real-World Impact
Worst Case
Attackers successfully enumerate all valid user accounts and use this information to conduct targeted credential stuffing attacks, leading to account compromise and potential data breaches.
Likely Case
Attackers identify valid user accounts and use this information for targeted phishing or social engineering attacks against specific users.
If Mitigated
With proper controls like rate limiting and consistent error messages, attackers cannot reliably enumerate accounts, reducing the attack surface significantly.
🎯 Exploit Status
Exploitation requires only basic HTTP requests and analysis of error messages.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.6.1 or later
Vendor Advisory: https://huntr.com/bounties/e7359f9f-c004-4304-9de9-753622d370a1
Restart Required: No
Instructions:
1. Update to langgenius/dify-web version 1.6.1 or later. 2. Verify the update was successful. 3. Test authentication error messages to ensure consistent responses.
🔧 Temporary Workarounds
Implement consistent authentication error messages
allModify authentication endpoints to return identical error messages for both non-existent accounts and incorrect passwords.
🧯 If You Can't Patch
- Implement rate limiting on authentication endpoints to prevent automated enumeration
- Deploy a web application firewall (WAF) with rules to detect and block account enumeration patterns
🔍 How to Verify
Check if Vulnerable:
Attempt authentication with a non-existent username and note the error message. Then attempt with a known valid username but wrong password. If error messages differ, the system is vulnerable.Check Version:
Check the application version in the admin interface or configuration files.Verify Fix Applied:
Repeat the verification steps above. Both authentication attempts should return identical generic error messages.📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts with different usernames from same source IP
- Pattern of authentication failures followed by successful logins
Network Indicators:
- Unusual volume of authentication requests to login endpoints
- Requests with sequential or dictionary-based usernames
SIEM Query:
source_ip=* AND (event_type="authentication_failure" OR event_type="login_failed") AND count > 10 within 5 minutes