CVE-2022-0776: Cross-Site Scripting in reveal.js
Summary
CVE-2022-0776: Cross site scripting in reveal.js. Affects reveal.js versions < 4.3.0. Fixed in 4.3.0. How to fix ↓
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Background
reveal.js is an open-source HTML presentation framework that allows users to create interactive and visually appealing slideshows. It is widely used for presentations, conferences, and educational purposes. The vulnerability identified as CVE-2022-0776 affects reveal.js versions prior to 4.3.0. This vulnerability allows an attacker to execute arbitrary JavaScript code on a victim's browser window hosting reveal.js by exploiting a cross-site scripting (XSS) vulnerability in the onmessage event listener in /plugin/notes/speaker-view.html.
Vulnerability Detail
The onmessage event listener in /plugin/notes/speaker-view.html does not properly validate the origin of postMessage requests before adding the content to the webpage. This allows any origin to postMessage on the browser window, enabling an attacker to inject malicious JavaScript code into the victim's browser. By exploiting this vulnerability, an attacker can potentially steal sensitive information, perform actions on behalf of the victim, or manipulate the content displayed in the reveal.js presentation.
How To Fix
Minimum fixed version
4.3.0
This is the first release that contains the fix.
npm install reveal.js@4.3.0Tip — 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 speaker view plugin in reveal.js to mitigate the risk of exploitation. This can be done by removing or commenting out the 'speaker' plugin from the list of plugins in the reveal.js configuration file.
Conclusion
CVE-2022-0776 is a cross-site scripting vulnerability in reveal.js that allows an attacker to execute arbitrary JavaScript code on a victim's browser window. Users are advised to upgrade to reveal.js version 4.3.0 or later to fix this vulnerability. A temporary workaround is available by disabling the speaker view plugin. For further assistance or support in vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for reveal.js →
FAQ
reveal.js is an open-source HTML presentation framework used for creating interactive slideshows.
This vulnerability allows an attacker to execute arbitrary JavaScript code on a victim's browser window hosting reveal.js, potentially leading to information theft, unauthorized actions, or content manipulation.
reveal.js versions prior to 4.3.0 are affected by this vulnerability.
To fix this vulnerability, it is recommended to upgrade to reveal.js version 4.3.0 or later.
Yes, users can disable the speaker view plugin in reveal.js as a temporary workaround.
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