Injected Scripts on Your Website: Signs and Fixes

Injected scripts are one of the most common website security problems. They can add popups, redirects, or hidden spam without obvious changes to your site design. Many small businesses never notice until customers complain or search traffic drops.

This guide explains how to spot injected scripts, how they get in, and how to remove them safely.

What injected scripts look like

• Unexpected popups or ads.
• Redirects to unrelated sites.
• Unknown tracking scripts in your page source.
• Pages loading slowly without a clear reason.

How scripts get injected

Most injected scripts come from:

• Outdated plugins or themes.
• Weak admin passwords.
• Compromised third party scripts.
• Unsecured file uploads.

How to check for injected scripts

1. View page source and search for unknown domains.
2. Compare your current HTML to a backup.
3. Check for recent file changes in your CMS.
4. Scan your site with a security tool.

How to remove injected scripts

Fixing this usually requires a clean restore and security updates:

• Restore from a known good backup.
• Update all plugins and themes.
• Change admin passwords and remove unknown users.
• Ask your host to run a malware scan.

How to prevent script injection

• Keep software updated.
• Use a web application firewall if available.
• Limit external scripts to trusted vendors.
• Monitor for content and integrity changes.