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.
{ "nvd_published_at": null, "cwe_ids": [ "CWE-79" ], "severity": "MODERATE", "github_reviewed": true, "github_reviewed_at": "2020-06-16T21:48:21Z" }