Nunjucks is a full featured templating engine for JavaScript. Versions 2.4.2 and lower have a cross site scripting (XSS) vulnerability in autoescape mode. In autoescape mode, all template vars should automatically be escaped. By using an array for the keys, such as name[]=<script>alert(1)</script>, it is possible to bypass autoescaping and inject content into the DOM.
{
"extracted_events": [
{
"introduced": "0"
},
{
"last_affected": "2.4.2"
}
],
"source": "CPE_RANGE",
"cpe": "cpe:2.3:a:mozilla:nunjucks:*:*:*:*:*:*:*:*"
}