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Medium 5.6Published May 4, 2021
CVE-2021-23383Prototype Pollution
Updated under an hour ago ()
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It affects handlebarsjs handlebars and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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
- 5.6 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- snyk
- NVD analysis
- Modified
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
handlebarsjs handlebars handlebarsjs:handlebars | before 4.7.7 | NVD |
netapp e-series_performance_analyzer netapp:e-series_performance_analyzer | all versions | NVD |
References
- https://github.com/handlebars-lang/handlebars.js/commit/f0589701698268578199be25285b2ebea1c1e427x-refsource-misc
- https://snyk.io/vuln/SNYK-JS-HANDLEBARS-1279029x-refsource-misc
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1279030x-refsource-misc
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1279031x-refsource-misc
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1279032x-refsource-misc
- https://security.netapp.com/advisory/ntap-20210618-0007/x-refsource-confirm
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.