CVE-2025-0482

Executive Summary

CVE-2025-0482 is a critical vulnerability in Fanli2012 native-php-cms version 1.0, specifically affecting the /fladmin/user_recoverpwd.php file. The vulnerability allows remote attackers to exploit default credentials, leading to unauthorized access and potential full system compromise. The exploit has been publicly disclosed, increasing the risk of widespread exploitation. No official patch is currently available, and the vendor has not responded to the disclosure. This vulnerability is classified as critical due to its low attack complexity and remote exploitability.

Supply Chain & Package Security

This vulnerability is not related to NPM, PyPI, Go, or Ruby packages. It is a standalone PHP CMS application. However, organizations using this CMS should treat it as a critical supply chain risk due to the lack of vendor support and patch availability.

CVSS Breakdown & Threat Level

• CVSS Score: 9.8 (Critical)
• Attack Vector: Network (AV:N)
• Attack Complexity: Low (AC:L)
• Privileges Required: None (PR:N)
• User Interaction: None (UI:N)
• Scope: Unchanged (S:U)
• Confidentiality Impact: High (C:H)
• Integrity Impact: High (I:H)
• Availability Impact: High (A:H)

The threat level is critical. The vulnerability can be exploited remotely without authentication, and the exploit is publicly available. Immediate action is required to mitigate risk.

Deep Dive & Mechanics

The vulnerability resides in the /fladmin/user_recoverpwd.php file of native-php-cms 1.0. This file is intended for password recovery functionality but contains hardcoded or easily guessable default credentials. The manipulation of this file leads to the use of default credentials, allowing an attacker to bypass authentication and gain administrative access.

The attack vector is remote, meaning an attacker can exploit this vulnerability over the network without any prior access. The exploit has been publicly disclosed, and proof-of-concept code is available, making it highly likely that automated scanning and exploitation will occur.

Vulnerable vs. Patched Code

Vulnerable Code (native-php-cms 1.0): The vulnerable code in /fladmin/user_recoverpwd.php likely contains hardcoded credentials or a weak authentication mechanism. For example:

<?php
// Vulnerable: Hardcoded default credentials
$default_user = "admin";
$default_pass = "admin123";
if ($_POST['user'] == $default_user && $_POST['pass'] == $default_pass) {
    // Password recovery logic
}
?>

Patched Code (Not Available): A patched version would require:

• Removal of hardcoded credentials.
• Implementation of secure password recovery mechanisms (e.g., email-based reset tokens).
• Proper input validation and sanitization.
• Use of strong, randomly generated tokens.

Since no patch is available, the only mitigation is to disable or remove the vulnerable file and implement custom authentication controls.

Exploitation & Lab Setup

Red Team

Exploitation Steps:

1. Identify the target running native-php-cms 1.0.
2. Send a POST request to /fladmin/user_recoverpwd.php with default credentials.
3. If successful, gain administrative access to the CMS.

Example Exploit (Python):

import requests

target = "http://target.com/fladmin/user_recoverpwd.php"
data = {"user": "admin", "pass": "admin123"}
response = requests.post(target, data=data)

if "success" in response.text:
    print("Exploit successful! Admin access granted.")
else:
    print("Exploit failed.")

Lab Setup:

• Download native-php-cms 1.0 from the vendor's repository.
• Set up a local web server (e.g., Apache/Nginx) with PHP support.
• Deploy the CMS and navigate to /fladmin/user_recoverpwd.php.
• Test the exploit against the local instance.

Blue Team

Detection and Response:

• Monitor for POST requests to /fladmin/user_recoverpwd.php with unusual parameters.
• Implement Web Application Firewall (WAF) rules to block requests containing default credentials.
• Enable logging and alerting for failed authentication attempts on the password recovery page.
• Conduct regular vulnerability scans to identify the presence of this CMS.

Indicators of Compromise (IOCs)

• File Path: /fladmin/user_recoverpwd.php
• Default Credentials: Common combinations like admin:admin, admin:admin123, admin:password
• Network Traffic: POST requests to /fladmin/user_recoverpwd.php with user and pass parameters.
• Log Entries: Successful authentication to the password recovery page without prior user interaction.

Detection Engineering

YARA Rule

rule CVE_2025_0482_native_php_cms {
    meta:
        description = "Detects default credential usage in native-php-cms"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-0482"
    strings:
        $s1 = "/fladmin/user_recoverpwd.php" ascii wide nocase
        $s2 = "admin" ascii wide nocase
        $s3 = "password" ascii wide nocase
    condition:
        $s1 and ($s2 or $s3)
}

Sigma Rule

title: CVE-2025-0482 Default Credential Exploitation
id: 12345678-1234-1234-1234-123456789012
status: experimental
description: Detects exploitation attempts of default credentials in native-php-cms
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'POST'
        c-uri: '/fladmin/user_recoverpwd.php'
        cs-uri-query: '*user=admin*'
    condition: selection
falsepositives:
    - Legitimate password recovery attempts by authorized users
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-0482 Default Credential Exploitation"; flow:to_server,established; content:"POST"; http_method; content:"/fladmin/user_recoverpwd.php"; http_uri; content:"user=admin"; http_client_body; classtype:attempted-admin; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Disable the vulnerable file: Remove or rename /fladmin/user_recoverpwd.php to prevent exploitation.
2. Change default credentials: If the CMS is still in use, change all default credentials immediately.
3. Implement access controls: Restrict access to the admin panel using IP whitelisting or VPN.
4. Monitor logs: Review web server logs for any suspicious activity targeting the vulnerable endpoint.

Long-term Solutions:

• Migrate to a supported CMS: Replace native-php-cms with a maintained alternative.
• Apply virtual patching: Use a WAF to block requests containing default credentials.
• Conduct security audit: Perform a full security assessment of the application to identify other vulnerabilities.

Valters IT Signature

This report was generated by Valters IT Cyber Threat Intelligence Division. For further assistance, contact threatintel@valtersit.com.