CVE-2025-59717

In the @digitalocean/do-markdownit package through 1.16.1 (in npm), the callout and fence_environment plugins perform .includes substring matching if allowedClasses or allowedEnvironments is a string (instead of an array).

More information : https://gist.github.com/thesmartshadow/dd19665f1f51a4e3c7a766e70c9eafd0