CVE-2021-23509

Public Exploit
Prototype Pollution

Description

This affects the package json-ptr before 3.0.0. A type confusion vulnerability can lead to a bypass of CVE-2020-7766 when the user-provided keys used in the pointer parameter are arrays.

Category

5.6
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.75% Top 20%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory snyk.io Third-Party Advisory snyk.io
Affected: n/a json-ptr
Published at:
Updated at:

References

Link Tags
https://snyk.io/vuln/SNYK-JS-JSONPTR-1577291 patch mitigation exploit vdb entry third party advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1767165 patch mitigation exploit vdb entry third party advisory
https://github.com/flitbit/json-ptr/pull/42 third party advisory patch
https://github.com/flitbit/json-ptr/commit/5dc458fbad1c382a2e3ca6d62e66ede3d92849ca third party advisory patch
https://github.com/flitbit/json-ptr%23security-vulnerabilities-resolved third party advisory broken link

Frequently Asked Questions

What is the severity of CVE-2021-23509?
CVE-2021-23509 has been scored as a medium severity vulnerability.
How to fix CVE-2021-23509?
To fix CVE-2021-23509, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-23509 being actively exploited in the wild?
It is possible that CVE-2021-23509 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-23509?
CVE-2021-23509 affects n/a json-ptr.
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