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Not in CISA KEV
MEDIUM severity

MJML allows mj-include directory traversal due to an incomplete fix for CVE-2020-12827GHSA-45h5-66jx-r2wf

MEDIUMFix: mjmlio/mjml#3033

GHSA-45h5-66jx-r2wf is a medium-severity (CVSS 4.5) CWE-36 vulnerability in mjml. A fix is available for mjml — see the affected versions and patch details below.

Also known asCVE-2025-67898
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for GHSA-45h5-66jx-r2wf.

EPSS Exploitation Probability

via FIRST.org ↗
0.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs18th percentile — riskier than 18% of all scored CVEsHighest risk
0.00%0.25%0.51%0.76%0.0%0.3%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

613other npm packages depend on this — each one inherits the vulnerability until it's patched upstream
mjmlnpm
2.7Mdownloads / week

Description

MJML before 5.0.0-alpha.9 allows mj-include directory traversal to test file existence and (in the type="css" case) read files. NOTE: this issue exists because of an incomplete fix for CVE-2020-12827.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmmjmlall versions5.0.0-alpha.9npm install mjml@5.0.0-alpha.9

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for mjml, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update mjml to 5.0.0-alpha.9 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-45h5-66jx-r2wf is resolved across your whole dependency graph.

  3. Workarounds

    Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.

Frequently Asked Questions

MJML before 5.0.0-alpha.9 allows mj-include directory traversal to test file existence and (in the type="css" case) read files. NOTE: this issue exists because of an incomplete fix for CVE-2020-12827.
O3 Security · Impact-Aware SCA

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MJML allows mj-include directory traversal due to an…