CVE-2021-23438
Type confusion in mpath
5.6
MEDIUM
CVSS 3.1
EPSS 0.52%
Description
This affects the package mpath before 0.8.4. A type confusion vulnerability can lead to a bypass of CVE-2018-16490. In particular, the condition `ignoreProperties.indexOf(parts[i]) !== -1` returns `-1` if `parts[i]` is `['__proto__']`. This is because the method that has been called if the input is an array is `Array.prototype.indexOf()` and not `String.prototype.indexOf()`. They behave differently depending on the type of the input.
How to fix CVE-2021-23438
To remediate CVE-2021-23438, upgrade the affected package to a fixed version below.
- —upgrade to 0.8.4 or later
Is CVE-2021-23438 being exploited?
Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 0.8.4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.6 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L |