Cross-site scripting vulnerability in TinyMCE
Summary
GHSA-q5pp-5q2h-g8rv: Duplicate Advisory: Cross-site scripting vulnerability in TinyMCE. Affected versions are not published. No fix is published. How to fix ↓
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Background
TinyMCE is a popular open-source WYSIWYG editor used for creating rich text content in web applications. It provides a user-friendly interface for editing and formatting text, allowing developers to integrate it seamlessly into their projects. However, versions of TinyMCE prior to 5.6.0 are susceptible to a stored cross-site scripting (XSS) vulnerability. This vulnerability allows an attacker to inject malicious HTML code into the editor, which can lead to the execution of arbitrary JavaScript code in the browser of another user.
Vulnerability Detail
The stored XSS vulnerability in TinyMCE arises due to insufficient input sanitization. When an attacker inserts crafted HTML code into the editor, it is not properly sanitized, allowing the execution of arbitrary JavaScript code. This can result in various malicious activities, such as stealing sensitive user information, performing actions on behalf of the user, or redirecting the user to malicious websites. The vulnerability can be exploited by an unauthenticated remote attacker, posing a significant risk to the security and integrity of affected applications.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
If upgrading to the latest version of TinyMCE is not immediately feasible, developers can implement a workaround by manually sanitizing user input before passing it to the editor. This can be achieved by using a trusted HTML sanitization library or framework that removes or escapes any potentially malicious code. It is crucial to carefully validate and sanitize user input to prevent the execution of arbitrary JavaScript code.
Conclusion
In conclusion, TinyMCE versions prior to 5.6.0 are vulnerable to a stored XSS vulnerability that allows an attacker to execute arbitrary JavaScript code in the browser of another user. To mitigate this risk, it is essential to upgrade to the latest version of TinyMCE or implement proper input sanitization. For further assistance or support in addressing this vulnerability, please contact DevNack.com.
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FAQ
The vulnerability allows an attacker to execute arbitrary JavaScript code in the browser of another user, potentially leading to various malicious activities such as data theft, unauthorized actions, or redirection to malicious websites.
Applications using versions of TinyMCE prior to 5.6.0 are affected by this vulnerability. Developers who have integrated TinyMCE into their projects should check the version they are using and take appropriate actions to mitigate the risk.
No, an unauthenticated remote attacker can exploit this vulnerability by inserting crafted HTML code into the editor.
There are no known instances of this vulnerability being actively exploited in the wild at the time of this advisory. However, it is crucial to promptly address this vulnerability to prevent potential attacks.
The recommended mitigation strategy is to upgrade to the latest version of TinyMCE (version 5.6.0 or above) or implement proper input sanitization to prevent the execution of arbitrary JavaScript code.
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