CVE-2021-23383
Prototype Pollution
CRITICAL 9.8EPSS 4.5%
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.
- Affected
- handlebars
- CVSS v3.1 NVD
- 9.8 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS v3.1 SNYK
- 5.6 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L - CVSS v2.0 NVD
- 7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P - EPSS
- 4.51% chance of exploitation in the next 30 days, 91st percentile
- Published
- 2021-05-04
- Updated
- 2026-10-08
Proof-of-concept exploits (5)
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1279031
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1279032
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1279030
- https://snyk.io/vuln/SNYK-JS-HANDLEBARS-1279029
- fazilbaig1/CVE-2021-233832★ · 2024-10-19
Security advisories
- handlebars-lang/handlebars.js/commit/f0589701698268578199be25285b2ebea1c1e427
- https://security.netapp.com/advisory/ntap-20210618-0007
- advisories/GHSA-765h-qjxv-5f44