What is CVE-2025-67843?

CVE-2025-67843 is a high-severity vulnerability in Mintlify, classified under Improper Neutralization of Special Elements Used in a Template Engine. CVSS score: 8.3/10. Published 2025-12-19.

How severe is CVE-2025-67843?

High severity. CVSS v3 base score is 8.3 out of 10.

Vulnerability in Mintlify

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.

Published 2025-12-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L.

EPSS exploit prediction

EPSS: 0.011 (64.6th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: +0.000

Affected products

Mintlify
Mintlify Platform — versions 0

Weakness classification (CWE)

CWE-1336 — Improper Neutralization of Special Elements Used in a Template Engine

References

www.mintlify.com/docs/changelog (Release Notes)
www.mintlify.com/blog/working-with-security-researchers-november-2025 (Vendor Advisory)
kibty.town/blog/mintlify/ (Exploit, Third Party Advisory)
news.ycombinator.com/item (Issue Tracking)

Frequently asked questions

What is CVE-2025-67843?: CVE-2025-67843 is a high-severity vulnerability in Mintlify, classified under Improper Neutralization of Special Elements Used in a Template Engine. CVSS score: 8.3/10. Published 2025-12-19.
How severe is CVE-2025-67843?: High severity. CVSS v3 base score is 8.3 out of 10.