THREATPORT/VULNERABILITY/CVE-2021-32820
HIGH SEVERITY

CVE-2021-32820

Express Handlebars vulnerability

CVSS
8.6
EPSS
18.0%
EPSS pct
97th
Exploited
No known
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.
Affected vendor
Express Handlebars Project
Affected product
Express Handlebars
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Weakness type (CWE)
  • CWE-200 — Exposure of Sensitive Information
  • CWE-94 — Code Injection
Published
2021-05-14

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality.

Its EPSS score of 18.0% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2021-32820

  • Confirm whether Express Handlebars Project Express Handlebars is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-32820.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-32820

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