Vulnerability Description
Express-handlebars is a Handlebars view engine for Express. Express-handlebars mixes pure template data with engine configuration options through the Express render API. More specifically, the layout parameter may trigger file disclosure vulnerabilities in downstream applications. This potential vulnerability is somewhat restricted in that only files with existing extentions (i.e. file.extension) can be included, files that lack an extension will have .handlebars appended to them. For complete details refer to the referenced GHSL-2021-018 report. Notes in documentation have been added to help users avoid this potential information exposure vulnerability.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Express Handlebars Project | Express Handlebars | <= 5.3.2 |
Related Weaknesses (CWE)
References
- https://github.com/express-handlebars/express-handlebars/blob/78c47a235c4ad7bc26Third Party Advisory
- https://github.com/express-handlebars/express-handlebars/commit/78c47a235c4ad7bcPatchThird Party Advisory
- https://github.com/express-handlebars/express-handlebars/pull/163ExploitThird Party Advisory
- https://securitylab.github.com/advisories/GHSL-2021-018-express-handlebars/ExploitThird Party Advisory
- https://www.npmjs.com/package/express-handlebarsThird Party Advisory
- https://github.com/express-handlebars/express-handlebars/blob/78c47a235c4ad7bc26Third Party Advisory
- https://github.com/express-handlebars/express-handlebars/commit/78c47a235c4ad7bcPatchThird Party Advisory
- https://github.com/express-handlebars/express-handlebars/pull/163ExploitThird Party Advisory
- https://securitylab.github.com/advisories/GHSL-2021-018-express-handlebars/ExploitThird Party Advisory
- https://www.npmjs.com/package/express-handlebarsThird Party Advisory
FAQ
What is CVE-2021-32820?
CVE-2021-32820 is a vulnerability with a CVSS score of 8.6 (HIGH). Express-handlebars is a Handlebars view engine for Express. Express-handlebars mixes pure template data with engine configuration options through the Express render API. More specifically, the layout ...
How severe is CVE-2021-32820?
CVE-2021-32820 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-32820?
Check the references section above for vendor advisories and patch information. Affected products include: Express Handlebars Project Express Handlebars.