CVE-2021-23518

Public Exploit
Prototype Pollution

Description

The package cached-path-relative before 1.1.0 are vulnerable to Prototype Pollution via the cache variable that is set as {} instead of Object.create(null) in the cachedPathRelative function, which allows access to the parent prototype properties when the object is used to create the cached relative path. When using the origin path as __proto__, the attribute of the object is accessed instead of a path. **Note:** This vulnerability derives from an incomplete fix in https://security.snyk.io/vuln/SNYK-JS-CACHEDPATHRELATIVE-72573

Category

7.3
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.11%
Third-Party Advisory github.com Third-Party Advisory debian.org Third-Party Advisory snyk.io Third-Party Advisory snyk.io
Affected: n/a cached-path-relative
Published at:
Updated at:

References

Link Tags
https://snyk.io/vuln/SNYK-JS-CACHEDPATHRELATIVE-2342653 patch exploit third party advisory issue tracking
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2348246 patch exploit third party advisory issue tracking
https://github.com/ashaffer/cached-path-relative/commit/40c73bf70c58add5aec7d11e4f36b93d144bb760 third party advisory patch
https://lists.debian.org/debian-lts-announce/2022/12/msg00006.html third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2021-23518?
CVE-2021-23518 has been scored as a high severity vulnerability.
How to fix CVE-2021-23518?
To fix CVE-2021-23518, 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-2021-23518 being actively exploited in the wild?
It is possible that CVE-2021-23518 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-23518?
CVE-2021-23518 affects n/a cached-path-relative.
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