Majority of Browser Extensions Pose Critical Security Risk, A New Report Reveals

Parkinsond

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Key Findings from the Report​

1. Extensions are Ubiquitous but Dangerous: 99% of enterprise users have browser extensions installed, with 52% running more than ten extensions, significantly broadening the threat surface.

Security analysis: Nearly every employee could potentially compromise organizational security.

2. Extensive Permissions to Sensitive Data: 53% of extensions installed in enterprise environments have 'high' or 'critical' risk permissions, allowing access to sensitive data like cookies, passwords, browsing history, and webpage contents.

Security analysis: One compromised extension can put the entire organization at risk.

3. GenAI Extensions: The Hidden Threat Over 20% of enterprise employees use GenAI extensions, with 58% of these holding 'high' or 'critical' permissions, creating significant risk.

Security analysis: Enterprises must implement strict policies on GenAI extension usage and data handling.

4. Untrusted Extension Publishers: 54% of extensions are published anonymously via Gmail accounts, with 79% from publishers who have released only one extension, making trust assessment extremely challenging.

Security analysis: Trust verification for extensions is highly difficult, increasing the likelihood of malicious activity.

5. Abandoned and Outdated Extensions: 51% of extensions haven't received updates in over a year, while 26% of enterprise extensions are sideloaded, bypassing security vetting.

Security analysis: Outdated or unmanaged extensions significantly raise security risks due to potential vulnerabilitie

 
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I anxiously looked at my work browser ..... No, it's only 13, it doesn't seem that bad. :D

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I've (anxiously) looked at my personal Firefox browser extensions. What I find (mostly non-actionable) are:

2. Duh! Most useful extensions can read data from all the pages and have access to the browser's tabs. This is already a known problem.

3. Even Grammarly is based on an LLM engine. Even if you turn off the "Used for training data" option, there is no guarantee. Most intelligent, well-funded extensions are going to be like this.

4. VT4Browsers from VirusTotal. Last updated: July 2024. One extension published only. Open-sourced projects tend to be like this. Even "recommended" projects can be like this.

5. Thank God many extensions would break without updating along with the browser's updates, but it doesn't necessarily mean keeping up with security holes either. No sideloading? No problem.
 
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