CVE-2021-41086: Clipboard-based XSS in jsuites
Summary
CVE-2021-41086: Clipboard-based XSS. Affects jsuites versions < 4.9.11. Fixed in 4.9.11. How to fix ↓
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Background
jsuites is an npm package that provides an HTML editor functionality. It allows users to edit and manipulate HTML content within a web application. However, a vulnerability has been discovered in jsuites that enables clipboard-based cross-site scripting (XSS) attacks. This vulnerability arises when a user copies content from a malicious source and pastes it into the HTML editor. The clipboard content is directly written to the innerHTML property, leading to the execution of arbitrary JavaScript code.
Vulnerability Detail
The clipboard-based XSS vulnerability in jsuites allows an attacker to inject malicious code into the HTML editor. By tricking a user into copying and pasting content from a malicious source, the attacker can execute arbitrary JavaScript code within the user's browser. This can lead to various consequences, such as stealing sensitive information, performing actions on behalf of the user, or manipulating the displayed content. The vulnerability is classified with a CVSS score of 8.7, indicating a high severity level.
How To Fix
Minimum fixed version
4.9.11
This is the first release that contains the fix.
npm install jsuites@4.9.11Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can disable the copy-paste functionality in the HTML editor of jsuites. By preventing users from pasting content into the editor, the risk of clipboard-based XSS attacks can be mitigated. However, this workaround may limit the usability of the editor for legitimate users. Here is an example code snippet to disable the copy-paste functionality:
const editor = new jsuites.Editor();
editor.disableCopyPaste();
Conclusion
The clipboard-based XSS vulnerability in jsuites poses a significant risk to users who copy and paste content from untrusted sources into the HTML editor. It is crucial to update the jsuites package to the latest version (4.9.11 or later) to mitigate this vulnerability. Disabling the copy-paste functionality can serve as a temporary workaround, but it may impact the usability of the editor. For further assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability allows an attacker to execute arbitrary JavaScript code within the user's browser, potentially leading to sensitive information theft, unauthorized actions, or content manipulation.
Updating the jsuites package to version 4.9.11 or later will fix the vulnerability. Ensure that you follow the recommended update process for your specific environment.
Yes, you can disable the copy-paste functionality in the HTML editor of jsuites as a temporary workaround. However, this may limit the usability of the editor for legitimate users.
While specific exploits may not be publicly disclosed, the vulnerability has the potential to be exploited by attackers who can trick users into copying and pasting malicious content into the HTML editor.
You can refer to the advisory provided by the GitHub Security Advisory Database for more details on this vulnerability (GHSA-qh7x-j4v8-qw5w). Additionally, the referenced research article 'The Curious Case of Copy & Paste' provides insights into the risks of pasting arbitrary content in browsers.
References
Related vulnerabilities
Recent vulnerabilities recorded for jsuites.
