CVE-2025-67843: A Server-Side Template Injection (SSTI) vulnerability in the MDX Rendering Engine in Mintlify Platform before

Q: How do I fix CVE-2025-67843?

mintlify: upgrade to 2025-11-15. Exact commands for each OS are on this page.

Q: Is CVE-2025-67843 being exploited?

CVE-2025-67843 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-67843 affect?

CVE-2025-67843 affects mintlify. Severity is high (CVSS 8.3). 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.

Q: How urgent is CVE-2025-67843?

Priority 50/100. High severity; Public exploit reference

This month

HIGH 8.3UPGRADE

CVE-2025-67843 is a high-severity flaw (CVSS 8.3) affecting mintlify. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-1336
Published	2025-12-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mintlify

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-12-19 02:16 UTCPublished CVE record published
2026-06-17 09:58 UTCUpdated Record last modified

mintlify mintlify UPGRADE

Affected: < 2025-11-15

Fixed in: 2025-11-15

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mintlify || rpm -q mintlify || mintlify --version

2. UPGRADE to 2025-11-15 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mintlify

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mintlify

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
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-2025-67843?

mintlify: upgrade to 2025-11-15. Exact commands for each OS are on this page.

Is CVE-2025-67843 being exploited?

CVE-2025-67843 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-2025-67843 affect?

CVE-2025-67843 affects mintlify. Severity is high (CVSS 8.3). 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.

How urgent is CVE-2025-67843?

Priority 50/100. High severity; Public exploit reference

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References

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