Versions 1.4.0 and earlier of remarkable are affected by a cross-site scripting vulnerability. This occurs because vulnerable versions of remarkable did not properly whitelist link protocols, and consequently allowed javascript: to be used.
Markdown Source:
[link](<javascript:alert(1)>)
Rendered HTML:
<a href="javascript:alert(1)">link</a>
Update to version 1.4.1 or later
{
"cwe_ids": [
"CWE-94"
],
"github_reviewed": true,
"github_reviewed_at": "2020-08-31T18:08:29Z",
"nvd_published_at": null,
"severity": "HIGH"
}