Laravel Framework XSS in Blade templating engine
A security researcher has disclosed a possible XSS vulnerability in the Blade templating engine.
Given the following two Blade templates:
resources/views/parent.blade.php:
@section('content')
<input value="{{ $value }}">
@showresources/views/child.blade.php:
@extends('parent')
@section('content')
<input value="{{ $value }}">
@endsectionAnd a route like the following:
Route::get('/example', function() {
$value = '//localhost/###parent-placeholder-040f06fd774092478d450774f5ba30c5da78acc8## onclick=location.assign(this.value);//';
return view('child', ['value' => $value]);
});The broken HTML element may be clicked and the user is taken to another location in their browser due to XSS. This is due to the user being able to guess the parent placeholder SHA-1 hash by trying common names of sections. If the parent template contains an exploitable HTML structure an XSS vulnerability can be exposed.
This vulnerability has been patched by determining the parent placeholder at runtime and using a random hash that is unique to each request.
Software afectado
Haz clic en una tecnología para ver todas sus vulnerabilidades.
| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Paquete de Composer | illuminate/view | < 6.20.42, >= 7.0.0, < 7.30.6, >= 8.0.0, < 8.75.0 | 6.20.42, 7.30.6, 8.75.0 |
| Paquete de Composer | laravel/framework | < 6.20.42, >= 7.0.0, < 7.30.6, >= 8.0.0, < 8.75.0 | 6.20.42, 7.30.6, 8.75.0 |
Referencias
- https://github.com/laravel/framework/security/advisories/GHSA-66hf-2p6w-jqfw
- https://nvd.nist.gov/vuln/detail/CVE-2021-43808
- https://github.com/laravel/framework/pull/39906
- https://github.com/laravel/framework/pull/39908
- https://github.com/laravel/framework/pull/39909
- https://github.com/laravel/framework/commit/b8174169b1807f36de1837751599e2828ceddb9b
- https://github.com/FriendsOfPHP/security-advisories/blob/master/illuminate/view/CVE-2021-43808.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/laravel/framework/CVE-2021-43808.yaml
- https://github.com/laravel/framework
- https://github.com/laravel/framework/releases/tag/v6.20.42
- https://github.com/laravel/framework/releases/tag/v7.30.6
- https://github.com/laravel/framework/releases/tag/v8.75.0
- Vector CVSS
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N- Debilidad (CWE)
CWE-327, CWE-79- Plataforma
- Composer
- Paquete
illuminate/view, laravel/framework- Publicada
- 08.12.2021
- Actualizado
- 11.10.2026 10:22
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-66hf-2p6w-jqfw - CC BY 4.0
Historial de vulnerabilidades: laravel/framework
Todas las vulnerabilidades publicadas de este paquete (Paquete de Composer), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 26
- Primera → última
- 01.2021 09.2026
- Sin corrección
- 0
- Explotada en ataques
- 1
Distribución por gravedad
- Crítica 2
- Alta 11
- Media 12
- Baja 1
Divulgaciones por año
- 2021: 5
- 2022: 5
- 2023: 0
- 2024: 10
- 2025: 3
- 2026: 3
-
Laravel Framework XSS in Blade templating engine esta entrada
Identifica las vulnerabilidades de tu aplicación
Con la integración de DockRay y el inventario de software activado, DockRay compara las versiones notificadas de los componentes con las vulnerabilidades conocidas y avisa de las coincidencias confirmadas. La cobertura depende de la tecnología compatible y de los avisos disponibles.