Skip to content
CVE PROGRAM SOURCE RECORD10.0 Critical

CVE-2021-39199

Cross site scripting via unsafe defaults in remark-html

Description

remark-html is an open source nodejs library which compiles Markdown to HTML. In affected versions the documentation of remark-html has mentioned that it was safe by default. In practice the default was never safe and had to be opted into. That is, user input was not sanitized. This means arbitrary HTML can be passed through leading to potential XSS attacks. The problem has been patched in 13.0.2 and 14.0.1: `remark-html` is now safe by default, and the implementation matches the documentation. On older affected versions, pass `sanitize: true` if you cannot update.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

remarkjs remark-html

  • >= 14.0.0, < 14.0.1affected
  • < 13.0.2affected

References