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Fix uploads and displaying of malicious SVG files

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This commit is contained in:
Chris Hunt
2025-07-13 17:00:23 +01:00
parent d1801d1088
commit 2df58472a1
29 changed files with 21703 additions and 12651 deletions
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27
app/Http/Controllers/SettingsController.php
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@@ -5,6 +5,7 @@ namespace App\Http\Controllers;
use App\Setting;
use App\SettingGroup;
use Exception;
use enshrined\svgSanitize\Sanitizer;
use Illuminate\Contracts\View\View;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
@@ -68,16 +69,30 @@ class SettingsController extends Controller
if ($setting->type === 'image') {
$validatedData = $request->validate([
'value' => 'image'
'value' => 'image',
]);
if (!$request->hasFile('value')) {
throw new \Exception(
'file_too_big'
);
throw new \Exception('file_too_big');
}
$path = $request->file('value')->store('backgrounds', 'public');
$image = $request->file('value');
$extension = $image->getClientOriginalExtension();
if ($extension === 'svg') {
$sanitizer = new Sanitizer();
$sanitizedSvg = $sanitizer->sanitize(file_get_contents($image->getRealPath()));
// Verify that the sanitization removed malicious content
if (strpos($sanitizedSvg, '<script>') !== false) {
throw new \Exception('SVG contains malicious content and cannot be uploaded.');
}
// Save the sanitized SVG back to the file
file_put_contents($image->getRealPath(), $sanitizedSvg);
}
$path = $image->store('backgrounds', 'public');
if ($path === null) {
throw new \Exception('file_not_stored');
@@ -99,7 +114,7 @@ class SettingsController extends Controller
} catch (Exception $e) {
return redirect($route)
->with([
'errors' => collect([__('app.alert.error.'.$e->getMessage())]),
'errors' => collect([__('app.alert.error.' . $e->getMessage())]),
]);
}
}