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jquery prototype pollution

Mitigating CVE-2019-11358 in old versions of jQuery

By Martijn Korse / 2nd August 2019

A few months ago, a new vulnerability was found in jQuery, affecting all existing versions of jQuery. It was fixed only in the new version 3.4.0.The SNYK website has a lot of detailed information about this ‘Prototype Pollution’ vulnerability, so I won’t go into that here. For those interested, follow this link : What…

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dns caa record

Implementing a CAA Record

By Martijn Korse / 3rd March 2019

It has been a while since tools like Qualys’ SSLLabs and are reporting on the usage of CAA records. So anyone caring about the quality and security of their SSL connection will probably have noticed its existence by now. But what is it for and how do you configure it? In short: using a…

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Two Factor Authentication Cross Site Request Forgery (CSRF) vulnerability (CVE-2018-20231)

By Martijn Korse / 24th January 2019

At BitnessWise we recently did a review of a few Two Factor Authentication (2FA) plugins for WordPress. First we selected some candidates based on usability and free-version features and after that performed a technical review of the plugin. This revealed a vulnerability we’d like to discuss in this post for future reference and to better…

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We prevented a sign-in attempt

By Martijn Korse / 13th July 2018

Last weekend, almost exactly between April Fools’ Day and Halloween, Google played a prank and scared us! If you have used Gmail on different devices, you probably know the kind of message you get when you log in from a different device. Additionally, you might be presented with a security question if Google doesn’t trust…

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Don’t trust Google Links

By Martijn Korse / 17th December 2017

Phishing campaigns are lucrative and probably will continue to be so for a while longer: they are cheap to launch and it only takes a few recipients that click on your malicious link to be successful. But awareness about the dangers of clicking on links is slowly rising. So if you’re a bad guy, how…

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User Friendly vs Secure

By Martijn Korse / 24th November 2017

Security is sometimes compared to healthy food. Quite a nice analogy: we all know we should eat healthy but we don’t always do it. The same is true for security: even though we know security measures are important, we sometimes favour a situation that is less secure. For various reasons.

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Reproducible Builds

Reproducible Builds

Last September a lot of users got infected with malware when they downloaded the CCleaner update. Hackers had been able to hide the Floxif Trojan inside the installer of the update. CCleaner is a utility program used to clean potentially unwanted files and invalid Windows Registry entries from a computer. This is a chart from…


Personal Data in URLs

Parameters in the url (GET parameters) are used to pass information to the destination on the target server. Quite often I see cases where these GET parameters are used to transmit personal data. For example, a company sends out a newsletter to their clients with a link to their website where they want to personalize…

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