Provide references for CVE-2021-21353.
Where can I find more information about CVE-2021-21353?
References are available at: https://github.com/pugjs/pug/security/advisories/GHSA-p493-635q-r6gr, https://github.com/pugjs/pug/issues/3312, https://github.com/pugjs/pug/pull/3314, https://github.com/pugjs/pug/commit/991e78f7c4220b2f8da042877c6f0ef5a4683be0, https://github.com/pugjs/pug/releases/tag/pug%403.0.1, https://www.npmjs.com/package/pug, https://www.npmjs.com/package/pug-code-gen.