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.striptags() 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 striptags().
{
"versions": [
{
"introduced": "4.2.0"
},
{
"fixed": "4.2.21"
},
{
"introduced": "5.1"
},
{
"fixed": "5.1.9"
},
{
"introduced": "0"
},
{
"last_affected": "5.2"
}
]
}