GHSA-45h5-66jx-r2wf

MJML allows mj-include directory traversal due to an incomplete fix for CVE-2020-12827

Source: GitHub Advisory Database (reviewed) Moderate CVE-2025-67898

Packages

Ecosystem	Package	Affected	Fixed in
npm	mjml	< 5.0.0-alpha.9	5.0.0-alpha.9

Details

As written in the advisory (Markdown source, shown as plain text).

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.

References

External links from the advisory. They lead to third-party sites.

https://nvd.nist.gov/vuln/detail/CVE-2020-12827 advisory
https://nvd.nist.gov/vuln/detail/CVE-2025-67898 advisory
https://github.com/mjmlio/mjml/issues/3018 web
https://github.com/mjmlio/mjml/pull/3033 web
https://github.com/mjmlio/mjml/commit/517b376b068e71c713ec4bb4ef9e5b0b7235b8ce web
https://github.com/mjmlio/mjml package