CVE-2021-23436
5.6 · MEDIUMOverview
CVE-2021-23436 is a medium-severity vulnerability affecting immer_project immer. It was published on September 1, 2021 and has a CVSS 3.1 base score of 5.6 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.6, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
This affects the package immer before 9.0.6. A type confusion vulnerability can lead to a bypass of CVE-2020-28477 when the user-provided keys used in the path parameter are arrays. In particular, this bypass is possible because the condition (p === "__proto__" || p === "constructor") in applyPatches_ returns false if p is ['__proto__'] (or ['constructor']). The === operator (strict equality operator) returns false if the operands have different type.
Remediation
Check the references section for vendor advisories and patches from immer_project. Update immer to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| immer_project | immer | >= 0, < 9.0.6 | Affected |
References
Frequently Asked Questions
What is CVE-2021-23436?
CVE-2021-23436 is a medium-severity vulnerability affecting immer_project immer. It was published on September 1, 2021 and has a CVSS 3.1 base score of 5.6 (MEDIUM).
How severe is CVE-2021-23436?
This vulnerability has a CVSS 3.1 base score of 5.6, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-23436?
Check the references section for vendor advisories and patches from immer_project. Update immer to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-23436?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-23436 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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