CVE-2025-3709: Account Lockout Bypass Vulnerability in Agentflow

Overview

This blog post delves into the intricacies of a critical vulnerability identified in the Agentflow software from Flowring Technology. CVE-2025-3709, as it is officially designated, allows unauthenticated remote attackers to exploit an Account Lockout Bypass vulnerability, enabling them to perform password brute force attacks. This vulnerability holds great weight because of its potential to compromise systems or even lead to severe data leakage, impacting any organization using the affected software.

Vulnerability Summary

CVE ID: CVE-2025-3709
Severity: Critical, CVSS score 9.8
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise and potential data leakage

Affected Products

Product | Affected Versions

Agentflow | All versions prior to the vendor patch

How the Exploit Works

CVE-2025-3709 exploits a weakness in the account lockout mechanism of Agentflow. Under normal circumstances, after a certain number of failed login attempts, a user account would be locked out, preventing further attempts. However, this vulnerability allows an attacker to bypass the lockout mechanism, thereby allowing them to continuously attempt to crack the password through brute force. Given enough time and computational power, this could potentially lead to unauthorized access to the system.

Conceptual Example Code

Below is a
conceptual
example of how the vulnerability might be exploited using a brute force script.

import requests
target_url = 'http://target.example.com/login'
username = 'admin'
passwords = ['password1', 'password2', 'password3', ...]  # a list of possible passwords
for password in passwords:
response = requests.post(target_url, data={'username': username, 'password': password})
if 'Login failed' not in response.text:
print(f'Success! The password is {password}')
break

This script would attempt to log in to the target URL with a list of possible passwords. If the login fails, the script continues to the next password. If the login is successful, the script stops and prints the discovered password.
Remember, this is purely a conceptual scenario for educational purposes and should not be used for malicious activities. Always act ethically and respect privacy.