What’s Vulnerable › Vulnerabilities

CVE-2025-59717

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-09-19 · updated 2026-06-17
• Weakness: CWE-843

Description

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 products

• DigitalOcean @digitalocean/do-markdownit: through 1.16.1

References

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

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