Description
An issue was discovered in Django 4.2 before 4.2.21, 5.1 before 5.1.9, and 5.2 before 5.2.1. The django.utils.html.strip_tags() function is vulnerable to a potential denial-of-service (slow performance) when processing inputs containing large sequences of incomplete HTML tags. The template filter striptags is also vulnerable, because it is built on top of strip_tags().
Metrics
CVSS 3.1 5.3/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| djangoproject | Django | >= 4.2, < 4.2.21; >= 5.1, < 5.1.9; >= 5.2, < 5.2.1 |
References
- https://docs.djangoproject.com/en/dev/releases/security/Release Notes
- https://groups.google.com/g/django-announceMailing List
- https://www.djangoproject.com/weblog/2025/may/07/security-releases/Vendor Advisory
- http://www.openwall.com/lists/oss-security/2025/05/07/1Mailing List, Third Party Advisory
Timeline
- Published
- May 8, 2025
- Last modified
- Jun 17, 2026
- NVD status
- Analyzed