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().
Remediation
References
Related Vulnerabilities
Apache Tomcat Loop with Unreachable Exit Condition ('Infinite Loop') Vulnerability (CVE-2020-13935)
Moodle Incorrect Permission Assignment for Critical Resource Vulnerability (CVE-2021-21809)
Java Denial of Service (DoS) Vulnerability (CVE-2019-2769)
OpenSSL Improper Input Validation Vulnerability (CVE-2016-6305)