What is CVE-2023-23630?

CVE-2023-23630 is a vulnerability in the Eta templating engine which allows for cross-site scripting (XSS) attacks.

Who is affected by CVE-2023-23630?

Anyone using the Eta templating engine with the Express API is impacted by CVE-2023-23630.

How can I protect myself from CVE-2023-23630?

To protect yourself from CVE-2023-23630, upgrade to version 2.0.0 of the Eta templating engine and avoid passing user-supplied input directly to `res.render`.

What is the severity of CVE-2023-23630?

CVE-2023-23630 has a severity rating of high, with a CVSS score of 6.1.

Where can I find more information about CVE-2023-23630?

More information about CVE-2023-23630 can be found at the following references: [GitHub Commit](https://github.com/eta-dev/eta/commit/5651392462ee0ff19d77c8481081a99e5b9138dd), [GitHub Release](https://github.com/eta-dev/eta/releases/tag/v2.0.0), [GitHub Security Advisory](https://github.com/eta-dev/eta/security/advisories/GHSA-xrh7-m5pp-39r6).

Vulnerability/
CVE-2023-23630

high

8.6

CWE

1/2/2023

10/3/2025

CVE-2023-23630: Cross-site (XSS) vulnerability with Express API in Eta

First published: Wed Feb 01 2023(Updated: )

Eta is an embedded JS templating engine that works inside Node, Deno, and the browser. XSS attack - anyone using the Express API is impacted. The problem has been resolved. Users should upgrade to version 2.0.0. As a workaround, don't pass user supplied things directly to `res.render`.

Credit: security-advisories@github.com

Affected Software	Affected Version	How to fix
Math.js	<2.0.0

Remedy

https://github.com/eta-dev/eta/commit/5651392462ee0ff19d77c8481081a99e5b9138dd

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Reference Links

Frequently Asked Questions

What is CVE-2023-23630?
CVE-2023-23630 is a vulnerability in the Eta templating engine which allows for cross-site scripting (XSS) attacks.
Who is affected by CVE-2023-23630?
Anyone using the Eta templating engine with the Express API is impacted by CVE-2023-23630.
How can I protect myself from CVE-2023-23630?
To protect yourself from CVE-2023-23630, upgrade to version 2.0.0 of the Eta templating engine and avoid passing user-supplied input directly to `res.render`.
What is the severity of CVE-2023-23630?
CVE-2023-23630 has a severity rating of high, with a CVSS score of 6.1.
Where can I find more information about CVE-2023-23630?
More information about CVE-2023-23630 can be found at the following references: [GitHub Commit](https://github.com/eta-dev/eta/commit/5651392462ee0ff19d77c8481081a99e5b9138dd), [GitHub Release](https://github.com/eta-dev/eta/releases/tag/v2.0.0), [GitHub Security Advisory](https://github.com/eta-dev/eta/security/advisories/GHSA-xrh7-m5pp-39r6).

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vendor/eta.js
canonical/math.js

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