Web Browser Security Audit as of June 1, 2007
With the recent updates on the Firefox and Opera Web browsers, I wonder which among the popular browsers is the most secure. Secunia has a huge repository of security advisories on a variety of software and what better way to check on the vulnerabilities of Web browsers than to visit the Website? However, it would take me some time and effort to find those specific vulnerabilities considering that Secunia is a huge repository.

It’s a good thing that I found Stay Secure. It’s an Opera widget created by grafio. With Stay Secure, I could easily identify the Web browser with the least security advisory and vice versa using Opera. I can also click on the icons so I could check what those vulnerabilities are on the Secunia Website. It’s quite a handy widget if one wants to be updated.
Anyway, here’s a brief summary of the security advisories of popular Web browsers as of June 1, 2007:
Internet Explorer 7 (Windows) - 10 vulnerabilities, 7 unpatched
Firefox 2.0.x - 9 vulnerabilities, 5 unpatched
Opera 9.x - 6 vulnerabilities, 0 unpatched
Safari 2.x (MacOS) - 6 vulnerabilities, 4 unpatched
Konqueror (Linux) - 11 vulnerabilities, 1 unpatched
While it is apparent that Internet Explorer is the most unpatched Web browser, it is also the browser with the most number of users (about 60% of the Web browser market share). Generally, we could say that Internet Explorer is the most popular Web browser, that’s why a large number of attacks is targeted towards it. Opera on the other hand, only has around 1% of the market share. Whatever the market share is, the immediate response of these companies and the way they implement patches is a reflection of how secure their browser is. (Related story: IE7 Update: Stagnant Market Share. Web Designers Not Surprised. For up-to-date stats on Web browser market share, visit W3Schools’ Browser Statistics page.
Web browsers are I think the most often used software in the world, so we should take the issue of browser security seriously. What do you do with all these gabs about Web browser security? Well, the message remains the same:
- Make it a habit to religiously update your Web browser.
- Visit Websites that present useful information. (Where did Cialis and Viagra referrals direct you anyway?)

June 2nd, 2007 at 13:24
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June 2nd, 2007 at 15:50
Agree with your the audit, most popular should be large number of attack. That’s why we have to update all the things related to our software, networking with latest updated.
June 5th, 2007 at 14:24
Yeah I agree with you on that, the more popular a web browser the more vulnerabilities it will be.
September 21st, 2008 at 5:31
Thank you very much for this information.
April 14th, 2009 at 18:24
very informative post!!!
It’s fact that most popular website tend to suffer lot of attacks… It’s necessary to take the issue of the security seriously…