An issue was discovered in markdown2 (aka python-markdown2) through 2.3.5. The safe_mode feature, which is supposed to sanitize user input against XSS, is flawed and does not escape the input properly. With a crafted payload, XSS can be triggered, as demonstrated by omitting the final '>' character from an IMG tag.
{
"extracted_events": [
{
"introduced": "0"
},
{
"last_affected": "2.3.5"
}
],
"source": "CPE_RANGE",
"cpe": "cpe:2.3:a:python-markdown2_project:python-markdown2:*:*:*:*:*:*:*:*"
}