What’s Vulnerable › Vulnerabilities

CVE-2020-7741: Cross-site Scripting (XSS)

• Severity: high (CVSS 7.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-10-06 · updated 2026-06-17
• Weakness: CWE-79

Description

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).

Affected products

• Hello.Js Project Hello.Js: before 1.18.6 — fixed in 1.18.6

How to fix

Upgrade to a fixed version: Hello.Js Project Hello.Js 1.18.6. Check the vendor advisory for mitigations.

References

• https://github.com/MrSwitch/hello.js/blob/3b79ec93781b3d7b9c0b56f598e060301d1f3e73/dist/hello.all.js%23L1545
• https://github.com/MrSwitch/hello.js/commit/d6f5137f30de6e0ef7048191ee6ae575fdc2f669
• https://snyk.io/vuln/SNYK-JS-HELLOJS-1014546
• https://github.com/MrSwitch/hello.js/blob/3b79ec93781b3d7b9c0b56f598e060301d1f3e73/dist/hello.all.js%23L1545
• https://github.com/MrSwitch/hello.js/commit/d6f5137f30de6e0ef7048191ee6ae575fdc2f669
• https://snyk.io/vuln/SNYK-JS-HELLOJS-1014546

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