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Django 2.1.9 release notes

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*June 3, 2019*

Django 2.1.9 fixes security issues in 2.1.8.

CVE-2019-12308: AdminURLFieldWidget XSS

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The clickable "Current URL" link generated by ``AdminURLFieldWidget`` displayed

the provided value without validating it as a safe URL. Thus, an unvalidated

value stored in the database, or a value provided as a URL query parameter

payload, could result in an clickable JavaScript link.

``AdminURLFieldWidget`` now validates the provided value using

:class:`~django.core.validators.URLValidator` before displaying the clickable

link. You may customize the validator by passing a ``validator_class`` kwarg to

``AdminURLFieldWidget.__init__()``, e.g. when using

:attr:`~django.contrib.admin.ModelAdmin.formfield_overrides`.

Patched bundled jQuery for CVE-2019-11358: Prototype pollution

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jQuery before 3.4.0, mishandles ``jQuery.extend(true, {}, ...)`` because of

``Object.prototype`` pollution. If an unsanitized source object contained an

enumerable ``__proto__`` property, it could extend the native

``Object.prototype``.

The bundled version of jQuery used by the Django admin has been patched to

allow for the ``select2`` library's use of ``jQuery.extend()``.