Django security releases issued: 5.2.1, 5.1.9 and 4.2.21

NewsBot · 8 May 2025 04:23

A new Django blog post/announcement has been posted!

In accordance with our security release policy, the Django team is issuing releases for Django 5.2.1, Django 5.1.9 and Django 4.2.21. These releases address the security issues detailed below. We encourage all users of Django to upgrade as soon as possible.

CVE-2025-32873: Denial-of-service possibility in strip_tags()

django.utils.html.strip_tags() would be slow to evaluate certain inputs containing large sequences of incomplete HTML tags. This function is used to implement the striptags template filter, which was thus also vulnerable. django.utils.html.strip_tags() now raises a SuspiciousOperation exception if it encounters an unusually large number of unclosed opening tags.

Thanks to Elias Myllymäki for the report.

This issue has severity "moderate" according to the Django security policy.

Affected supported versions

Django main

Django 5.2

Django 5.1

Django 4.2

Resolution

Patches to resolve the issue have been applied to Django's main, 5.2, 5.1, and 4.2 branches. The patches may be obtained from the following changesets.

https://www.djangoproject.com/weblog/2025/may/07/security-releases/