CVE-2021-32820
More specifically, the layout parameter may trigger file disclosure vulnerabilities in downstream applications.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 15.7%, higher than 97% of all known CVEs. Patch or mitigate before the next change window.
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 3.1
- 8.6 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
- EPSS
- 15.74% probability · 97th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-200, CWE-94
- Affected
- express handlebars project/express handlebars
- Source
- security-advisories@github.com
EPSS 15.7% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/express-handlebars/express-handlebars/blob/78c47a235c4ad7bc2674bddd8ec2721567ed8c72/README.md#danger-Third Party Advisory
- https://github.com/express-handlebars/express-handlebars/commit/78c47a235c4ad7bc2674bddd8ec2721567ed8c72Patch, Third Party Advisory
- https://github.com/express-handlebars/express-handlebars/pull/163Exploit, Third Party Advisory
- https://securitylab.github.com/advisories/GHSL-2021-018-express-handlebars/Exploit, Third Party Advisory
- https://www.npmjs.com/package/express-handlebarsThird Party Advisory
- https://github.com/express-handlebars/express-handlebars/blob/78c47a235c4ad7bc2674bddd8ec2721567ed8c72/README.md#danger-Third Party Advisory
- https://github.com/express-handlebars/express-handlebars/commit/78c47a235c4ad7bc2674bddd8ec2721567ed8c72Patch, Third Party Advisory
- https://github.com/express-handlebars/express-handlebars/pull/163Exploit, Third Party Advisory
- https://securitylab.github.com/advisories/GHSL-2021-018-express-handlebars/Exploit, Third Party Advisory
- https://www.npmjs.com/package/express-handlebarsThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.