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Janis Steiner
231
server/app-code/system/secure_zone/php/add_user.php
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231
server/app-code/system/secure_zone/php/add_user.php
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<?php
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session_start();
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// Check if the user is logged in
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if (!isset($_SESSION['username']) or !isset($_SESSION["login"])) {
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// Redirect to the login page or handle unauthorized access
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header("Location: /login.php");
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exit();
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}
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$username = $_SESSION['username'];
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$perms = $_SESSION["perms"];
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$email = $_SESSION["email"];
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if($perms[0]!=="1"){
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header("location:/system/insecure_zone/php/no_access.php");
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$block=1;
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exit();
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}else{
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$block=0;
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}
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//for the get_perms_str() function
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include "perms_functions.php";
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?>
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
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<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.bundle.min.js" integrity="sha384-MrcW6ZMFYlzcLA8Nl+NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP+JcXn/tWtIaxVXM" crossorigin="anonymous"></script>
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<title>Change Password</title>
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</head>
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<body>
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<div class="container mt-5">
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<div class="row justify-content-center">
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<div class="col-md-6">
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<div class="card">
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<div class="card-header">
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<h4>Add a user</h4>
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</div>
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<div class="card-body">
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<form action="add_user.php?add=true" method="post">
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<div class="form-group">
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<label for="username">Username:</label>
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<input type="text" class="form-control" id="username" name="username" required>
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</div>
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<div class="form-group">
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<label for="email">Email:</label>
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<input type="email" class="form-control" id="email" name="email" required>
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</div>
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<div class="form-group">
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<label for="password">Password:</label>
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<input type="password" class="form-control" id="password" name="password" required>
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</div>
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<label for="perms_table">User permissions:</label>
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<table class="table" id="perms_table" name="perms_table">
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<thead>
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<tr>
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<th>#</th>
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<th>Description</th>
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<th>Allow/Deny</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<th scope="row">1</th>
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<td>Add user <a data-bs-target="#warning" data-bs-toggle="modal" href="#warning">(Warning!)</a></td>
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<td><input type="checkbox" name="add_user"></td>
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</tr>
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<tr>
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<th scope="row">2</th>
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<td>Delete/list/manage user <a data-bs-target="#warning2" data-bs-toggle="modal" href="#warning2">(Warning!)</a></td>
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<td><input type="checkbox" name="delete_user"></td>
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</tr>
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<tr>
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<th scope="row">3</th>
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<td>View log</td>
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<td><input type="checkbox" name="view_log"></td>
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</tr>
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<tr>
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<th scope="row">4</th>
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<td>Delete log</td>
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<td><input type="checkbox" name="delete_log"></td>
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</tr>
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<tr>
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<th scope="row">5</th>
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<td>Server Settings</td>
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<td><input type="checkbox" name="server_settings"></td>
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</tr>
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<tr>
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<th scope="row">6</th>
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<td>Client settings</td>
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<td><input type="checkbox" name="client_settings"></td>
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</tr>
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<tr>
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<th scope="row">7</th>
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<td>Database settings</td>
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<td><input type="checkbox" name="database_settings"></td>
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</tr>
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<tr>
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<th scope="row">8</th>
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<td>Add clients</td>
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<td><input type="checkbox" name="add_clients"></td>
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</tr>
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<tr>
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<th scope="row">9</th>
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<td>Delete/list clients</td>
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<td><input type="checkbox" name="delete_clients"></td>
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</tr>
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<tr>
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<th scope="row">10</th>
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<td>View Incidents</td>
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<td><input type="checkbox" name="view_incidents"></td>
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</tr>
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<tr>
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<th scope="row">11</th>
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<td>Manage Incidents</td>
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<td><input type="checkbox" name="manage_incidents"></td>
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</tr>
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</tbody>
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</table>
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<button type="submit" class="btn btn-primary btn-block">Add user</button>
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</form>
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<br>
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<!-- php code to add user-->
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<?php
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// Check if the form is submitted
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if ($_SERVER["REQUEST_METHOD"] == "POST" and $block==0) {
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//include db pw
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include "../../../config.php";
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// Retrieve user input
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$password = $_POST["password"];
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$email=$_POST["email"];
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$username=$_POST["username"];
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$hash=password_hash($password, PASSWORD_BCRYPT);
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// Create a connection
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$conn = new mysqli($DB_SERVERNAME, $DB_USERNAME, $DB_PASSWORD, $DB_DATABASE);
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// Check the connection
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if ($conn->connect_error) {
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die("Connection failed: " . $conn->connect_error);
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}
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$sql = "SELECT * FROM users WHERE username = ?";
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$stmt = $conn->prepare($sql);
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$stmt->bind_param("s", $username);
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// Execute the statement
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$stmt->execute();
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// Get the result
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$result = $stmt->get_result();
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$stmt->close();
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$conn->close();
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// Check if the user exists and verify the password
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if ($result->num_rows > 0) {
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echo '<div class="alert alert-danger" role="alert">
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User already exists!
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</div>';
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}else{
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$conn = new mysqli($DB_SERVERNAME, $DB_USERNAME, $DB_PASSWORD,$DB_DATABASE);
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if ($conn->connect_error) {
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$success=0;
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die("Connection failed: " . $conn->connect_error);
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}
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$stmt = $conn->prepare("INSERT INTO users (email, username, password,perms,allow_pw_login,send_login_message,use_2fa) VALUES (?, ?, ?, ?,1,0,0)");
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$stmt->bind_param("ssss", $email, $username, $hash, $permissions);
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$email=htmlspecialchars($_POST["email"]);
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$username=htmlspecialchars($_POST["username"]);
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$password=$_POST["password"];
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$permissions=get_perm_str();
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$hash=password_hash($password, PASSWORD_BCRYPT);
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$stmt->execute();
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$stmt->close();
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$conn->close();
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echo '<div class="alert alert-success" role="alert">
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User added successfully!
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</div>';
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}
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}elseif($block==1){
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echo '<div class="alert alert-danger" role="alert">
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You do not have permission to add a user!
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</div>';
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}
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?>
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</div>
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</div>
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</div>
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<div class="modal fade" id="warning" tabindex="-1" aria-labelledby="exampleModalLabel" aria-hidden="false">
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<div class="modal-dialog">
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<div class="modal-content">
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<div class="modal-header">
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<h5 class="modal-title" id="exampleModalLabel">User add permission warning</h5>
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<button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
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</div>
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<div class="modal-body">
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A user with the permission "add_user" can add new users with all permissions.<br>
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Including permissions which the user, who creates the new user does not have.<br>
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This can be used for privilege escalation!<br>
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Please only allow a few trusted users this permission!
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</div>
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</div>
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</div>
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</div>
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<div class="modal fade" id="warning2" tabindex="-1" aria-labelledby="warning2_label" aria-hidden="false">
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<div class="modal-dialog">
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<div class="modal-content">
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<div class="modal-header">
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<h5 class="modal-title" id="warning2_label">User manage permission warning</h5>
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<button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
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</div>
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<div class="modal-body">
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A user with the permission "manage_user" can change all permissions of all users.<br>
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Including permissions which the user, who has this permission does not have.<br>
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This can be used for privilege escalation!<br>
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Please only allow a few trusted users this permission!
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</div>
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</div>
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</div>
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</div>
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</div>
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</div>
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</body>
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</html>
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