CVE-2025-59717

Summary

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).

Affected Software

Weaknesses

• CWE-843: CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

Additional References

• https://gist.github.com/thesmartshadow/dd19665f1f51a4e3c7a766e70c9eafd0

References

• https://github.com/digitalocean/do-markdownit
• https://gist.github.com/thesmartshadow/dd19665f1f51a4e3c7a766e70c9eafd0
• https://www.npmjs.com/package/@digitalocean/do-markdownit

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