GHSA-wjrh-hj83-3wh7 Django-Select2 Vulnerable to Widget Instance Secret Cache Key Leaking

• PyPI django-select2: < 8.4.1 → fixed in 8.4.1

Impact Instances of `HeavySelect2Mixin` subclasses like the `ModelSelect2MultipleWidget` and `ModelSelect2Widget` can secret access tokens across requests. This can allow users to access restricted querysets and restricted data. Patches The problem has been patched in version 8.4.1 and all following versions. Workarounds This vulnerability is limited use cases where instances of widget classes are created during app loading (not during a request). Example of affected code: ```python class MyForm(forms.ModelForm): class Meta: widgets = {"my_select_field": Select2ModelWidget()} ``` Django allows you to pass just the widget class (not the instance). This can be used to mitigate the session request leak. Example of affected code: ```python class MyForm(forms.ModelForm): class Meta: widgets = {"my_select_field": Select2ModelWidget} ``` References Thanks to @neartik for reporting this issue. I will address it later. I had to delete your issue, to avoid exploitation of this security issue.