CVE-2025-0803

Executive Summary

CVE-2025-0803 is a critical SQL injection vulnerability in Codezips Gym Management System 1.0. The flaw exists in the /dashboard/admin/submit_plan_new.php endpoint, where the planid parameter is directly concatenated into SQL queries without sanitization. An unauthenticated attacker can remotely exploit this to extract, modify, or delete database contents, potentially leading to full system compromise. No patch has been released by the vendor, and a public proof-of-concept (PoC) is available.

CVSS Breakdown & Threat Level

• 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) – vulnerability does not affect other components.
• Confidentiality Impact (C): High (H) – full database read access.
• Integrity Impact (I): High (H) – data can be modified or deleted.
• Availability Impact (A): High (H) – database can be disrupted.

Threat Level: Critical – immediate action required.

Deep Dive & Mechanics

The vulnerability resides in the PHP file submit_plan_new.php. The planid parameter from HTTP GET/POST requests is used directly in a SQL query without parameterization or escaping. An attacker can inject SQL commands by appending malicious payloads to the planid value.

Example vulnerable code snippet (conceptual):

$planid = $_REQUEST['planid'];
$query = "SELECT * FROM plans WHERE id = $planid";
$result = mysqli_query($conn, $query);

This allows classic SQL injection techniques such as UNION SELECT, OR 1=1, and time-based blind injection.

Vulnerable vs. Patched Code

Vulnerable Code (submit_plan_new.php):

$planid = $_GET['planid'];
$sql = "DELETE FROM plans WHERE id = $planid";
mysqli_query($conn, $sql);

Patched Code (recommended):

$planid = intval($_GET['planid']);
$sql = "DELETE FROM plans WHERE id = ?";
$stmt = mysqli_prepare($conn, $sql);
mysqli_stmt_bind_param($stmt, "i", $planid);
mysqli_stmt_execute($stmt);

The patched version uses prepared statements and input validation to prevent injection.

Exploitation & Lab Setup

Red Team (Exploitation)

Lab Setup:

1. Deploy Codezips Gym Management System 1.0 on a local server (e.g., XAMPP).
2. Ensure the /dashboard/admin/submit_plan_new.php endpoint is accessible.

Exploit Steps:

1. Identify the vulnerable parameter: planid.
2. Use a SQL injection tool like sqlmap:

   sqlmap -u "http://target/dashboard/admin/submit_plan_new.php?planid=1" --batch --dbs
   

3. Manual injection example:

   http://target/dashboard/admin/submit_plan_new.php?planid=1 UNION SELECT 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