Redcarpet is a Ruby library for Markdown processing. In Redcarpet before version 3.5.1, there is an injection vulnerability which can enable a cross-site scripting attack. In affected versions no HTML escaping was being performed when processing quotes. This applies even when the :escape_html option was being used. This is fixed in version 3.5.1 by the referenced commit.
{
"github_reviewed": true,
"cwe_ids": [
"CWE-74",
"CWE-79"
],
"github_reviewed_at": "2021-01-11T19:05:42Z",
"nvd_published_at": "2021-01-11T19:15:00Z",
"severity": "MODERATE"
}