Wagtail: Improper permission handling in image preview
Impact
Due to a missing permission check on the image preview endpoint, a user with access to the Wagtail admin can preview any image. The existing data of the image object itself is not exposed. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin.
Patches
Patched versions have been released as Wagtail 7.0.8, 7.3.3, 7.4.2.
Workarounds
For sites that cannot easily upgrade to a current supported version, the vulnerability can be patched by adding the following code to urls.py URL pattern declarations to override the vulnerable view.
from django.core.exceptions import PermissionDenied
from django.shortcuts import get_object_or_404
from django.urls import path
from wagtail.admin import urls as wagtailadmin_urls
from wagtail.images.permissions import permission_policy
from wagtail.images.views import preview
def patched_preview(request, image_id, filter_spec):
image = get_object_or_404(get_image_model(), id=image_id)
if not permission_policy.user_has_permission_for_instance(request.user, "change", image):
raise PermissionDenied
return preview(request, image_id, filter_spec)
urlpatterns = [
# Example where the CMS admin is at /admin/.
# Add this before the Wagtail admin URLs registration, with the same sub-path.
path("admin/images/<int:image_id>/preview/<str:filter_spec>/", patched_preview)
path("admin/", include(wagtailadmin_urls)),
]Acknowledgements
Many thanks to @0x1saac and @harshakshit for reporting this issue.
For more information
If you have any questions or comments about this advisory:
- Visit Wagtail's support channels
- Email us at security@wagtail.org (view our security policy for more information).
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Python (PyPI) | wagtail | < 7.0.8, >= 7.1, < 7.3.3, >= 7.4, < 7.4.2 | 7.0.8, 7.3.3, 7.4.2 |
Referencias
- Vector CVSS
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N- Debilidad (CWE)
CWE-280- Plataforma
- Python (PyPI)
- Paquete
wagtail- Publicada
- 01.07.2026
- Actualizado
- 11.10.2026 15:17
Fuentes y licencias
OSV / GitHub Advisory Database - PYSEC-2026-614 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-r6p4-grq7-xm4m - CC BY 4.0
Historial de vulnerabilidades: wagtail
Todas las vulnerabilidades publicadas de este paquete (Python (PyPI)), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 30
- Primera → última
- 04.2020 08.2026
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Alta 5
- Media 22
- Baja 3
Divulgaciones por año
- 2020: 3
- 2021: 2
- 2022: 1
- 2023: 3
- 2024: 3
- 2025: 0
- 2026: 18
-
Wagtail: Improper permission handling in image preview esta entrada
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