mistune.py in Mistune 0.7.4 allows XSS via an unexpected newline (such as in java\nscript:) or a crafted email address, related to the escape and autolink functions.
{
"cwe_ids": [
"CWE-79"
],
"github_reviewed": true,
"github_reviewed_at": "2022-07-01T19:44:32Z",
"nvd_published_at": "2017-10-19T08:29:00Z",
"severity": "MODERATE"
}