npm hellojs vulnerabilities

Latest npm hellojs CVEs

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1. CVE-2021-26505 MrSwitch hello.js vulnerable to prototype pollution

   Published 2023-08-11

   Critical·CVSS 9.8 EPSS 1.1%

   Prototype pollution vulnerability in MrSwitch hello.js version 1.18.6, allows remote attackers to execute arbitrary code via hello.utils.extend function.

2. CVE-2020-7741 Cross-site Scripting (XSS)

   Published 2020-10-06

   Critical·CVSS 9.9 EPSS 1.5%

   This affects the package hellojs before 1.18.6. The code get the param oauth_redirect from url and pass it to location.assign without any check and sanitisation. So we can simply pass some XSS payloads into the url param oauth_redirect, such as javascript:alert(1).

Sources: CVE.org, NVD, CISA KEV, FIRST EPSS, OSV and public exploit-reference metadata. Product matching comes from the published CVE records. A proof-of-concept means public code exists; it is not evidence of exploitation.