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GHSA-5mrf-j8v6-f45g

LowCVSS 3.7 / 10
Published Nov 18, 2025·Last modified Nov 20, 2025
Affected Components(0)

No affected components available

Description

Summary

A Weak Password Policy vulnerability was identified in the user management functionality of the LibreNMS application. This vulnerability allows administrators to create accounts with extremely weak and predictable passwords, such as 12345678. This exposes the platform to brute-force and credential stuffing attacks.


Details

Vulnerable Component: User creation / password definition

The application fails to enforce a strong password policy when creating new users. As a result, administrators can define trivial and well-known weak passwords, compromising the authentication security of the system.


PoC

  1. Log in to the application using an Administrator account.

  2. Navigate to the user management section:

  3. Create a new user account using the password 12345678.

<img width="1103" height="852" alt="image" src="https://github.com/user-attachments/assets/a20d4226-9f86-46ee-a4e6-45be91bb6b7b" />
  1. The application accepts the weak password without restrictions and creates the account successfully.
<img width="1359" height="487" alt="image" src="https://github.com/user-attachments/assets/9bec15bf-b38f-448b-8f98-acca5724e143" />

Impact

Weak password policy vulnerabilities can have severe consequences, including:

  • Increased risk of brute-force and credential stuffing attacks

  • Unauthorized access to user or administrative accounts

  • Privilege escalation through compromised credentials

  • Degradation of the overall security posture of the platform


Mitigation

  • Enforce a strong password policy (e.g., minimum of 12 characters with uppercase, lowercase, digits, and special characters).

  • Block the use of commonly known weak passwords (e.g., 12345678, password, admin, qwerty).

Risk Scores
Base Score
3.7

The vulnerability can be exploited over the network without needing physical access. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a low impact on the confidentiality of the information.

Threat Intelligence
3.4

Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.

EPSS
0.25%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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