CVE-2021-23383

CRITICAL
Published May 4, 20215y ago · Modified Jun 17, 20262w ago
9.8 CVSS 3.1
Critical
Find Similar
Published May 4, 2021 5y ago
Last Modified Jun 17, 2026 2w ago

Description

The package handlebars before 4.7.7 are vulnerable to Prototype Pollution when selecting certain compiling options to compile templates coming from an untrusted source.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-1321

Affected Products 2

VendorProductVersionRange
handlebarsjshandlebars* <4.7.7
netappe-series_performance_analyzer*any

References 6

  • github.com https://github.com/handlebars-lang/handlebars.js/commit/f0589701698268578199be25285b2ebea1c1e427
    PatchThird Party Advisory
  • security.netapp.com https://security.netapp.com/advisory/ntap-20210618-0007/
    Third Party Advisory
  • snyk.io https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1279031
    ExploitPatchThird Party Advisory
  • snyk.io https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1279032
    ExploitPatchThird Party Advisory
  • snyk.io https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1279030
    ExploitPatchThird Party Advisory
  • snyk.io https://snyk.io/vuln/SNYK-JS-HANDLEBARS-1279029
    ExploitPatchThird Party Advisory

Remediation

  • github.com https://github.com/handlebars-lang/handlebars.js/commit/f0589701698268578199be25285b2ebea1c1e427
    PatchThird Party Advisory
  • snyk.io https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1279031
    ExploitPatchThird Party Advisory
  • snyk.io https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1279032
    ExploitPatchThird Party Advisory
  • snyk.io https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1279030
    ExploitPatchThird Party Advisory
  • snyk.io https://snyk.io/vuln/SNYK-JS-HANDLEBARS-1279029
    ExploitPatchThird Party Advisory