CVE-2021-32820

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 v3.1

8.6 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

CVSS v3.1

8.6 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

CVSS v2.0

5.0 MEDIUMAV:N/AC:L/Au:N/C:P/I:N/A:N

EPSS

17.99% chance of exploitation in the next 30 days, 97th percentile

Nuclei

high

Published

2021-05-14

Updated

2024-08-03

Proof-of-concept exploits (1)

• https://securitylab.github.com/advisories/GHSL-2021-018-express-handlebars/

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-32820.yaml

References

• CVE Record
• NVD entry

Related

• CVE-2021-32819
• CVE-2021-32821
• CVE-2021-32817
• CVE-2021-32822
• CVE-2021-32816
• CVE-2021-32824