CVE-2021-23568
CRITICALCVSS 9.8/10EPSS 1.45%
Last modified
CVE-2021-23568 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The package extend2 before 1.0.1 are vulnerable to Prototype Pollution via the extend function due to unsafe recursive merge.. EPSS estimates a 1.45% chance of exploitation in the next 30 days.
Description
The package extend2 before 1.0.1 are vulnerable to Prototype Pollution via the extend function due to unsafe recursive merge.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Eggjs | Extend2 | < 1.0.1 |
References
- https://github.com/eggjs/extend2/commit/aa332a59116c8398976434b57ea477c6823054f8Patch, Third Party Advisory
- https://github.com/eggjs/extend2/pull/2Issue Tracking, Patch, Third Party Advisory
- https://snyk.io/vuln/SNYK-JS-EXTEND2-2320315Exploit, Third Party Advisory
- https://github.com/eggjs/extend2/commit/aa332a59116c8398976434b57ea477c6823054f8Patch, Third Party Advisory
- https://github.com/eggjs/extend2/pull/2Issue Tracking, Patch, Third Party Advisory
- https://snyk.io/vuln/SNYK-JS-EXTEND2-2320315Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-23568?
The package extend2 before 1.0.1 are vulnerable to Prototype Pollution via the extend function due to unsafe recursive merge.
How severe is CVE-2021-23568?
CVE-2021-23568 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.45% probability of exploitation in the next 30 days.
How do I fix CVE-2021-23568?
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-2021-23568?
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Scan your code nowSource: NVD / NIST