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Mixed Content Errors: Taming the Security Risks on Your Website

Have you ever encountered the frustrating mixed content error on your WordPress website? If so, you’re not alone. This common issue can occur when your site is loaded over HTTPS. Still, some resources, like images, scripts, or stylesheets, are loaded over HTTP, causing browsers to block them and potentially compromising the security and integrity of your site. But fear not! In this guide, we’ll walk you through the steps to fix the Mixed Content error and ensure your WordPress site is secure and fully functional.

What is a Mixed Content Error?

A Mixed Content error occurs when a web page is loaded over HTTPS (secure connection), but some resources within the page, such as images, scripts, or stylesheets, are loaded over HTTP (insecure connection). This creates a security risk because the insecure resources could potentially be intercepted or tampered with, compromising the integrity and security of the webpage. Modern browsers often block these insecure resources, leading to a warning or error message for users.

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Steps to Fix the Mixed Content Error 

Step 1: Identify Mixed Content Issues

The initial step is to identify which resources are causing the Mixed Content error. You can do this by using your browser’s developer tools. Simply right-click on your website, select “Inspect” or “Inspect Element,” and opt for the “Console” tab. Here, you’ll see any Mixed Content errors or warnings.

Mixed Content error

Step 2: Update URLs to HTTPS

Once you’ve identified the resources causing the error, you’ll need to update their URLs to use HTTPS instead of HTTP. This includes images, scripts, stylesheets, and any other resources loaded externally.

In WordPress, you can typically update these URLs in one of two ways:

  • Manually: Go through your site’s settings to find and replace HTTP URLs with HTTPS URLs.
  • Using a plugin: There are several WordPress plugins available that can help automate the process of updating URLs to HTTPS. One popular option is the Really Simple SSL plugin, which automatically detects and fixes Mixed Content issues.
Mixed Content error

Step 3: Update Internal Links

In addition to external resources, you’ll also need to update any internal links within your WordPress site to use HTTPS. This includes links within your content, menus, widgets, and theme files.

Again, you can do this manually or use a plugin like Link Whisper or Better Search Replace to bulk update internal links.

Mixed Content error

Step 4: Update Theme and Plugin Settings

Some WordPress themes and plugins may have settings or options that need to be configured to use HTTPS. Check the settings of your active theme and any installed plugins for options related to SSL or HTTPS, and ensure they are configured correctly.

Step 5: Test and Verify

Once you’ve updated all URLs, internal links, and settings to use HTTPS, it’s important to thoroughly test your site to ensure that the Mixed Content error has been resolved. Visit your site in different browsers and devices to check for any remaining issues. You can also use online tools like Why No Padlock or SSL Shopper to scan your site for Mixed Content errors.

ssl check

Step 6: Implement Content Security Policy (CSP)

To further tighten the security of your WordPress site and prevent future Mixed Content issues, consider implementing a Content Security Policy (CSP). Below is the code for it that you can include in the theme file editor of your site: 



  content="default-src 'self'; img-src https://*; child-src 'none';" />

A CSP allows you to control which resources can be loaded on your site and helps mitigate risks associated with cross-site scripting (XSS) attacks and other security vulnerabilities. 

To implement a CSP, you can add a Content-Security-Policy header to your site’s .htaccess file or use a security plugin like Security Headers to configure and manage your CSP settings.

How does Mixed Content Error Affect Website Security?

Mixed content affects website security by introducing potential vulnerabilities that can be exploited by attackers. When a website loads over HTTPS (secure connection), but certain resources within the page, such as images, scripts, or stylesheets, are loaded over HTTP (insecure connection), it creates a security risk.

Here’s how mixed content impacts website security:

  1. Data Integrity: Mixed content allows attackers to intercept or tamper with the insecure resources loaded over HTTP. This can lead to unauthorized modifications to the content of the website, compromising its integrity. For example, an attacker could implant malicious code into an insecure script, leading to cross-site scripting (XSS) attacks.
  2. Data Confidentiality: Insecure resources loaded over HTTP are susceptible to eavesdropping, where attackers can intercept sensitive information transmitted between the website and the user’s browser. This can include personal data, login credentials, or financial information entered by users on the website.
  3. Browser Warnings: Modern web browsers often block insecure resources when a website is loaded over HTTPS, leading to warning messages or errors for users. These warnings can deter visitors from accessing the website and undermine trust in its security, resulting in a degraded user experience and potential loss of traffic.
  4. Search Engine Penalties: Search engines like Google prioritize secure websites in search results and may penalize sites with mixed content errors. This can negatively impact the website’s search engine rankings and visibility, leading to decreased organic traffic and potential loss of revenue.


Now you know how you can fix the Mixed Content error on your WordPress website and get a certainty that it remains secure and accessible to your visitors. Remember to regularly monitor your site for any potential issues and stay proactive about keeping your WordPress installation, themes, and plugins updated to maintain optimal performance and security.


Can mixed content errors affect e-commerce websites and online transactions?

Yes, mixed content errors can affect e-commerce websites and online transactions. When users encounter warnings or errors related to mixed content while trying to make a purchase or enter sensitive information, it can undermine trust in the security of the website. This can lead to abandoned shopping carts, decreased conversion rates, and ultimately, lost revenue for the e-commerce business.

What are the potential consequences of ignoring mixed content errors?

Ignoring mixed content errors can have serious consequences for your website. Not only can it compromise the security and integrity of your site, but it can also lead to a poor user experience. Visitors may encounter browser warnings or errors when trying to access your site, which can deter them from visiting or cause them to leave the site altogether. Additionally, search engines like Google may penalize sites with mixed content errors, affecting their search engine rankings and visibility.

How can mixed content errors impact my website’s performance?

Mixed content errors can impact your website’s performance by slowing down page load times and increasing server load. When browsers encounter insecure resources, they may need to make additional requests to fetch those resources over a secure connection, resulting in longer load times. This can result in a poor user experience, especially during slower internet times or mobile devices.

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