CVE-2021-23518 Prototype Pollution

2022-01-2120:05:29

snyk

www.cve.org

package vulnerability prototype pollution cached-path-relative 2021-23518 cve-2021-23518 object.create(null) security.snyk.io/vuln/snyk-js-cachedpathrelative-72573

CVSS3

7.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

LOW

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P

AI Score

9.6

Confidence

High

EPSS

0.011

Percentile

85.0%

JSON

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

CNA Affected

[
  {
    "vendor": "n/a",
    "product": "cached-path-relative",
    "versions": [
      {
        "version": "unspecified",
        "lessThan": "1.1.0",
        "status": "affected",
        "versionType": "custom"
      }
    ]
  }
]