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Django 2.1.9 release notes
============================
*June 3, 2019*
Django 2.1.9 fixes security issues in 2.1.8.
CVE-2019-12308: AdminURLFieldWidget XSS
---------------------------------------
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
--------------------------------------------------------------
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()``.
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