CVE-2020-7770
CRITICALCVSS 9.8/10EPSS 1.87%
Last modified
CVE-2020-7770 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. This affects the package json8 before 1.0.3. The function adds in the target object the property specified in the path, however it does not properly check the key being set, leading to a prototype pollution.. EPSS estimates a 1.87% chance of exploitation in the next 30 days.
Description
This affects the package json8 before 1.0.3. The function adds in the target object the property specified in the path, however it does not properly check the key being set, leading to a prototype pollution.
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 |
|---|---|---|
| Json8 Project | Json8 | < 1.0.3 |
References
- https://github.com/sonnyp/JSON8/commit/2e890261b66cbc54ae01d0c79c71b0fd18379e7ePatch, Third Party Advisory
- https://snyk.io/vuln/SNYK-JS-JSON8-1017116Exploit, Third Party Advisory
- https://github.com/sonnyp/JSON8/commit/2e890261b66cbc54ae01d0c79c71b0fd18379e7ePatch, Third Party Advisory
- https://snyk.io/vuln/SNYK-JS-JSON8-1017116Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-7770?
This affects the package json8 before 1.0.3. The function adds in the target object the property specified in the path, however it does not properly check the key being set, leading to a prototype pollution.
How severe is CVE-2020-7770?
CVE-2020-7770 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.87% probability of exploitation in the next 30 days.
How do I fix CVE-2020-7770?
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-2020-7770?
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Scan your code nowSource: NVD / NIST