| Title | imvks786 student_management_system 1.0 SQL Injection |
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| Description | The application contains SQL injection vulnerabilities throughout nearly all database interaction points. User‑supplied input from `$_GET` and `$_POST` is concatenated directly into SQL queries without any parameterisation, escaping, or validation. This allows an attacker to manipulate query logic, leading to:
- **Authentication bypass** – log in as any user (including administrators) without valid credentials.
- **Unauthorised data deletion** – delete student records via `see.php?del=...`.
- **Unauthorised permission changes** – modify user roles via `admin/user_permission.php`.
- **Sensitive data exposure** – extract arbitrary data from the database using UNION‑based or blind techniques.
### Affected Code Examples
**1. Login bypass (department login):**
```php
// index.php
$usr = $_POST['usr'];
$pwd = $_POST['pwd'];
$ret = mysqli_query($con, "SELECT * FROM login WHERE username='$usr' AND password='$pwd' ");
``` |
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| Source | ⚠️ https://github.com/imvks786/student_management_system/issues/1 |
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| User | Amoda (UID 98400) |
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| Submission | 05/25/2026 05:55 (16 days ago) |
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| Moderation | 06/07/2026 21:53 (14 days later) |
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| Status | Accepted |
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| VulDB entry | 369147 [imvks786 student_management_system up to 9599b560ad3c3b83e75d328b76bedcd489ef1f46 Login /index.ph usr/pwd sql injection] |
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| Points | 20 |
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