CVE-2019-19935: DOM-based cross-site scripting in Froala Editor
Summary
CVE-2019-19935: DOM-based cross-site scripting in Froala Editor. Affects froala-editor versions < 3.2.3. Fixed in 3.2.3. How to fix ↓
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Background
Froala WYSIWYG HTML Editor is a lightweight WYSIWYG HTML Editor written in JavaScript that provides rich text editing capabilities for web applications. It allows users to easily create and edit HTML content within a web page. However, versions prior to 3.2.3 are vulnerable to a DOM-based cross-site scripting (XSS) attack. This vulnerability occurs because the HTML code in the editor is not properly sanitized when inserted into the Document Object Model (DOM). As a result, an attacker who can control the editor content can execute arbitrary JavaScript code within the victim's session.
Vulnerability Detail
The DOM-based cross-site scripting (XSS) vulnerability in Froala Editor allows an attacker to inject malicious JavaScript code into the editor's content, which is then executed in the context of the victim's session. This can lead to various security risks, including unauthorized access to sensitive information, session hijacking, and the execution of arbitrary actions on behalf of the victim. The vulnerability has a CVSS score of 6.1, indicating a moderate severity level.
How To Fix
Minimum fixed version
3.2.3
This is the first release that contains the fix.
npm install froala-editor@3.2.3Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If upgrading to the latest version is not feasible, a temporary workaround is to manually sanitize the HTML code before inserting it into the editor. This can be done using a library or custom code that properly sanitizes the input to prevent any potential XSS attacks. Here is an example of how to sanitize the input using the DOMPurify library:
const sanitizedContent = DOMPurify.sanitize(editorContent);
Conclusion
In conclusion, Froala Editor versions prior to 3.2.3 are vulnerable to a DOM-based cross-site scripting (XSS) attack. It is crucial to upgrade to the latest version or apply proper input sanitization to mitigate this vulnerability. Failure to address this issue can lead to unauthorized access, session hijacking, and other malicious activities. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
Froala WYSIWYG HTML Editor is a JavaScript-based lightweight HTML editor that enables rich text editing capabilities for web applications. It allows users to easily create and edit HTML content within a web page.
A DOM-based cross-site scripting (XSS) vulnerability occurs when untrusted user input is improperly handled and inserted into the Document Object Model (DOM) of a web page. This allows an attacker to inject and execute malicious JavaScript code within the victim's session.
The potential risks of this vulnerability include unauthorized access to sensitive information, session hijacking, and the execution of arbitrary actions on behalf of the victim. An attacker who can control the editor content can exploit this vulnerability to perform various malicious activities.
The CVSS score of this vulnerability is 6.1, indicating a moderate severity level. It is important to address this vulnerability to prevent potential security risks and protect the integrity of the application.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability. Vulert monitors and alerts in real-time for open-source vulnerabilities in software using just the package-lock.json file, without requiring access to the code or installation.
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