Critical severity · published Jan 21, 2022
CVE-2021-23518
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…
9.8
CVSS
1.9%
EPSS
No
On KEV
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
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.9% · higher than 80% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CA
Cached-path-relative · Cached-path-relative Project
before 1.1.0 · source: NVD
DL
Debian Linux · Debian
10.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-23518
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-23518
Patch
https://github.com/ashaffer/cached-path-relative/commit/40c73bf70c58add5aec7d11e4f36b93d144bb760
Mailing List
https://lists.debian.org/debian-lts-announce/2022/12/msg00006.html
Exploit
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2348246
Exploit
https://snyk.io/vuln/SNYK-JS-CACHEDPATHRELATIVE-2342653
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