PatchTheCVECVE-2025-59717: In the @digitalocean/do-markdownit package through 1.16.1 (in npm), the callout and fence_environment plugins
CVE-2025-59717 is a medium-severity flaw (CVSS 5.4) affecting do-markdownit. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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).
Why this priority
- Public exploit reference
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.4 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 67%) |
| CISA exploited list | No |
| Weakness | CWE-843 |
| Published | 2025-09-19 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2025-59717?
do-markdownit: upgrade to newer than 1.16.1. Exact commands for each OS are on this page.
Is CVE-2025-59717 being exploited?
CVE-2025-59717 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2025-59717 affect?
CVE-2025-59717 affects do-markdownit. Severity is medium (CVSS 5.4). 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).
How urgent is CVE-2025-59717?
Priority 37/100. Public exploit reference; Remotely exploitable, no login, no user action