Certain input when passed into remarkable before 1.4.1 will bypass the bad protocol check that disallows the javascript: scheme allowing for javascript: url's to be injected into the rendered content.
In remarkable lib/parser_inline.js mishandles URL filtering, which allows attackers to trigger XSS via unprintable characters.
lib/common/html_re.js in remarkable allows Regular Expression Denial of Service (ReDoS) via a CDATA section.
Remarkable allows the use of data: URIs in links and can therefore execute javascript.
remarkable allows the use of data: URIs.
Certain input when passed into remarkable will bypass the bad prototcol check that disallows the javascript: scheme allowing for javascript: url's to be injected into the rendered content.