How to Fix Mixed Content Warning on the SSL Website

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What is Mixed Content?

When a website’s HTML (Hyper-Text Mark-up Language) code is loaded with security of HTTPS connection and contains resources that are loaded over an insecure HTTP connection, then it is called Mixed Content since both secure and insecure pages are being loaded for the same display page which causes error.

Mixed Content reduces the strength of HTTPS security as when there a request of any resource using the insecure HTTP the website becomes vulnerable and can be attacked by hackers and other malicious parties.

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There are two types of Mixed Content – 

1) Mixed Passive Content (or Mixed Display Content)

This type of mixed content comes into picture when there is HTTP content on an HTTPS website that cannot alter the Document Objected Model (DOM) of the webpage.

Examples are – image, video and audio loads.

2) Mixed Active Content (or Mixed Script Content)

This is the content that has access to and can even affect all parts of the Document Objected Model (DOM) of an HTTPS page.

Examples - 

iframes, JavaScript, CSS, etc.

When a mixed content is generated different browsers show different symptoms –

        Firefox – A yellow triangle with an exclamation mark is seen on the padlock icon issuing a warning against the URL.
        Internet Explorer Version 10 – A warning message stating “Only Secured content is displayed” appears on the screen.
        Microsoft Edge – A warning message stating “You’re only seeing secure content” is displayed on the screen.
        Chrome – A warning symbol is displayed in front of the URL of the website indicating that the website is not secure and has mixed content.

SSL Certificates are issued to websites indicating that they are safe for usage and are protected against any malicious attack by hackers and secure the information of the user. But the SSL certificates issued to the website depend upon the Certificate Authority (CA) and they do not always function according to the prescribed regulations and often in many cases don’t do a proper verification and the sometimes issue them to insecure websites which is a threat to online security.

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