CVE-2021-23383
CRITICALCVSS 9.8/10EPSS 4.51%
Last modified
CVE-2021-23383 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 4.51% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Handlebarsjs | Handlebars | < 4.7.7 |
| Netapp | E-Series Performance Analyzer | All versions |
References
- https://github.com/handlebars-lang/handlebars.js/commit/f0589701698268578199be25285b2ebea1c1e427Patch, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210618-0007/Third Party Advisory
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1279031Exploit, Patch, Third Party Advisory
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1279032Exploit, Patch, Third Party Advisory
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1279030Exploit, Patch, Third Party Advisory
- https://snyk.io/vuln/SNYK-JS-HANDLEBARS-1279029Exploit, Patch, Third Party Advisory
- https://github.com/handlebars-lang/handlebars.js/commit/f0589701698268578199be25285b2ebea1c1e427Patch, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210618-0007/Third Party Advisory
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1279031Exploit, Patch, Third Party Advisory
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1279032Exploit, Patch, Third Party Advisory
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1279030Exploit, Patch, Third Party Advisory
- https://snyk.io/vuln/SNYK-JS-HANDLEBARS-1279029Exploit, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-23383?
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.
How severe is CVE-2021-23383?
CVE-2021-23383 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.51% probability of exploitation in the next 30 days.
How do I fix CVE-2021-23383?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-23383?
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