CVE-2024-24807: Sulu HTML Injection via Autocomplete Suggestion

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Background

Sulu is an open-source content management platform built on Symfony. It provides a flexible and extensible framework for creating and managing websites and web applications. Sulu allows users to create tags, and only admin users have the ability to create tags. The vulnerability in Sulu allows for HTML injection when inputting HTML into the tag name, which is executed when the tag name is listed in the autocomplete form. This vulnerability affects only admin users.

Vulnerability Detail

The HTML injection vulnerability in Sulu allows an attacker to inject malicious HTML code into the tag name, which is executed when the tag name is listed in the autocomplete form. This can lead to various security issues, such as cross-site scripting (XSS) attacks, where an attacker can execute arbitrary JavaScript code in the context of the admin user's session. Since only admin users can create tags, this vulnerability is limited to admin users.

Workaround

If users are unable to immediately upgrade to the patched versions, they can create a custom mutation observer to monitor and sanitize the tag name input, preventing the execution of any injected HTML code. Here is an example of how to create a custom mutation observer in JavaScript:

// Create a mutation observer
const observer = new MutationObserver((mutations) => {
  mutations.forEach((mutation) => {
    // Check if the tag name input has changed
    if (mutation.target.id === 'tag-name-input') {
      // Sanitize the input value
      const sanitizedValue = sanitizeHTML(mutation.target.value);
      // Set the sanitized value back to the input
      mutation.target.value = sanitizedValue;
    }
  });
});

// Start observing the tag name input
observer.observe(document.getElementById('tag-name-input'), { attributes: true, attributeFilter: ['value'] });

Conclusion

The HTML injection vulnerability in Sulu can be mitigated by upgrading to the patched versions or implementing the provided workaround. It is important for admin users of Sulu to take action to protect their systems from potential security risks. For further support on vulnerability remediation, please contact DevNack.com.

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