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Case File

CVE-2021-23438

MEDIUM · CVSS 5.6 EPSS 1.72% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-09-01 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-23438
Severity
MEDIUM
CVSS
5.6
EPSS
1.72%

Original NVD 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.