The documentation of remark-html has mentioned that it was safe by default. In practise the default was never safe and had to be opted into. This means arbitrary HTML can be passed through leading to potential XSS attacks.
Patches
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.
Workarounds
On older affected versions, pass sanitize: true, like so:
This PR contains the following updates:
8.0.0->13.0.2GitHub Vulnerability Alerts
CVE-2021-39199
Impact
The documentation of
remark-htmlhas mentioned that it was safe by default. In practise the default was never safe and had to be opted into. This means arbitrary HTML can be passed through leading to potential XSS attacks.Patches
The problem has been patched in 13.0.2 and 14.0.1:
remark-htmlis now safe by default, and the implementation matches the documentation.Workarounds
On older affected versions, pass
sanitize: true, like so:References
n/a
For more information
If you have any questions or comments about this advisory:
remark-htmlConfiguration
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