CVE-2025-67843: mintlify — Exploit & Fix

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.

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CVSS v3.1 Score

8.3

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

Weakness Type (CWE)

CWE-1336 CWE-1336

Affected Products

Vendor	Product	Versions
mintlify	mintlify	< 2025-11-15

References

Advisories & Patches

https://www.mintlify.com/blog/working-with-security-researchers-november-2025

Exploits

https://kibty.town/blog/mintlify/ https://kibty.town/blog/mintlify/

Other References

https://news.ycombinator.com/item?id=46317098 https://www.mintlify.com/docs/changelog

Frequently Asked Questions

What is CVE-2025-67843? +

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. It has a CVSS v3.1 base score of 8.3 (HIGH).

How severe is CVE-2025-67843? +

CVE-2025-67843 has a CVSS v3.1 score of 8.3 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-67843? +

CVE-2025-67843 affects products from mintlify, specifically: mintlify. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-67843? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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