CVE-2020-7741: XSS in hello.js
Summary
CVE-2020-7741: XSS in hello.js. Affects hellojs versions < 1.18.6. Fixed in 1.18.6. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
hello.js is an npm package that provides functionality for OAuth authentication. It is commonly used in web applications to enable users to authenticate using their social media accounts. The package allows developers to easily integrate OAuth authentication into their applications by providing a simple API. However, a vulnerability in versions prior to 1.18.6 allows for cross-site scripting (XSS) attacks.
Vulnerability Detail
The vulnerability in hello.js arises from the lack of input validation and sanitization of the 'oauth_redirect' parameter obtained from the URL. This parameter is then passed to the 'location.assign' function without any checks, allowing an attacker to inject malicious scripts. By crafting a URL with a payload such as 'javascript:alert(1)', an attacker can execute arbitrary JavaScript code in the context of the vulnerable application. This can lead to various consequences, including the theft of sensitive user information, session hijacking, or the defacement of the application.
How To Fix
Minimum fixed version
1.18.6
This is the first release that contains the fix.
npm install hellojs@1.18.6Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
A temporary workaround for this vulnerability is to manually validate and sanitize the 'oauth_redirect' parameter before passing it to the 'location.assign' function. This can be done by using a regular expression or a dedicated input validation library. Here is an example of how to sanitize the parameter using a regular expression in JavaScript:
const sanitizedRedirect = oauth_redirect.replace(/[^a-zA-Z0-9]/g, '');
location.assign(sanitizedRedirect);
Conclusion
The XSS vulnerability in hello.js versions prior to 1.18.6 can have severe consequences, including the theft of sensitive user information and the compromise of user sessions. It is crucial for developers to promptly update to the latest version of hello.js and implement proper input validation and sanitization to mitigate the risk. For further support on vulnerability remediation, contact DevNack.com.
See every vulnerability recorded for hellojs →
FAQ
The vulnerability allows an attacker to execute arbitrary JavaScript code in the context of the vulnerable application. This can lead to various consequences, including the theft of sensitive user information, session hijacking, or the defacement of the application.
Versions of hello.js prior to 1.18.6 are affected by this vulnerability.
There are currently no known public exploits for this vulnerability. However, it is important to apply the necessary fixes and security measures to prevent potential attacks.
Yes, the vulnerability has been fixed in version 1.18.6 of hello.js. It is recommended to update to the latest version to mitigate the risk.
To protect your application, it is recommended to implement proper input validation and sanitization for all user-supplied data. Additionally, consider implementing content security policies (CSP) to mitigate the impact of potential XSS attacks.
References
Related vulnerabilities
Recent vulnerabilities recorded for hellojs.
