What is Formjacking

Introduction

You might have heard about formjacking but aren’t quite sure what it means or why it matters. In simple terms, formjacking is a type of cyberattack that targets online forms to steal your sensitive information. If you shop online or fill out forms on websites, understanding formjacking is important to keep your data safe.

In this article, I’ll explain what formjacking is, how hackers use it, and what you can do to protect yourself. By the end, you’ll know how to spot this threat and keep your personal details secure when browsing or shopping online.

What Is Formjacking?

Formjacking is a cybercrime technique where hackers inject malicious code into online forms. These forms usually collect sensitive information like credit card numbers, login details, or personal data. When you enter your information, the malicious code secretly sends it to the attacker without your knowledge.

This type of attack is also called “digital skimming” because it works like a digital version of credit card skimming devices used in physical stores. Instead of stealing data from a card reader, hackers steal data directly from the website’s form fields.

How Formjacking Works

Hackers find vulnerabilities in a website’s code or third-party scripts.
They inject malicious JavaScript into the form fields.
When users fill out the form, the script captures the data.
The stolen data is sent to the attacker’s server.
Users remain unaware as the form appears normal.

Formjacking is dangerous because it can affect any website with forms, including online stores, payment portals, and login pages.

Why Is Formjacking a Growing Threat?

Formjacking has become more common in recent years due to the rise of online shopping and digital payments. Cybercriminals see it as an easy way to steal large amounts of data without directly hacking into a website’s main system.

Factors Driving the Rise of Formjacking

Increased online transactions: More people shop and pay bills online, creating more targets.
Use of third-party scripts: Many websites rely on external code, which can be compromised.
Difficulty in detection: Formjacking scripts are often small and hidden, making them hard to spot.
High rewards: Stolen credit card and personal data can be sold on the dark web for profit.

For example, major retail websites have been hit by formjacking attacks that compromised thousands of customers’ payment details. These incidents highlight how widespread and damaging this threat can be.

Common Targets of Formjacking Attacks

Hackers usually target websites where users enter sensitive information. These include:

E-commerce sites: Online stores where customers enter credit card details.
Payment gateways: Platforms that process online payments.
Login pages: Sites requiring usernames and passwords.
Government and healthcare portals: Where personal data is collected.
Travel and booking websites: Where payment and personal info are submitted.

Because these sites handle valuable data, they are prime targets for formjacking attacks.

How to Detect Formjacking on Websites

Detecting formjacking can be tricky because the malicious code is often hidden. However, you can watch for some signs:

Unexpected pop-ups or redirects: These may indicate malicious scripts.
Slow website performance: Extra scripts can slow down page loading.
Unusual form behavior: Forms that don’t submit properly or behave oddly.
Browser warnings: Some security tools alert you to suspicious scripts.

You can also use browser extensions or security software that scans websites for malicious code. Developers can use tools like Content Security Policy (CSP) to monitor and block unauthorized scripts.

How to Protect Yourself from Formjacking

While website owners have a big role in preventing formjacking, you can take steps to protect your data when browsing or shopping online.

Tips to Stay Safe

Use trusted websites: Stick to well-known and reputable sites.
Check for HTTPS: Always ensure the website uses secure HTTPS connections.
Keep your browser updated: Updates often include security patches.
Use security software: Antivirus and anti-malware tools can detect threats.
Avoid public Wi-Fi for payments: Public networks can be insecure.
Use virtual credit cards: Some banks offer disposable card numbers for online use.
Monitor your accounts: Regularly check bank and credit card statements for unusual activity.

By following these tips, you reduce the risk of falling victim to formjacking attacks.

How Website Owners Can Prevent Formjacking

Website owners and developers must take strong measures to protect their users from formjacking.

Best Practices for Website Security

Regularly audit third-party scripts: Only use trusted vendors and monitor their code.
Implement Content Security Policy (CSP): This restricts which scripts can run on your site.
Use Subresource Integrity (SRI): Ensures external scripts haven’t been tampered with.
Keep software updated: Apply patches to CMS, plugins, and server software.
Monitor website traffic: Look for unusual activity or data exfiltration.
Use Web Application Firewalls (WAF): These can block malicious requests.
Educate staff: Train developers and admins on security best practices.

Taking these steps helps reduce the risk of formjacking and protects your customers’ data.

Recent Examples of Formjacking Attacks

Several high-profile formjacking attacks have made headlines, showing how serious this threat is.

British Airways (2026): Hackers injected malicious scripts into the payment page, stealing thousands of customers’ credit card details.
Ticketmaster (2025): A third-party chatbot script was compromised, leading to formjacking on their payment form.
Newegg (2026): The electronics retailer suffered a formjacking attack that exposed customer payment information.

These cases show that even large companies with strong security can be vulnerable, especially through third-party code.

The Future of Formjacking and Cybersecurity

As online transactions grow, formjacking will likely remain a popular attack method. However, cybersecurity technologies are evolving to fight back.

Emerging Trends

AI-powered detection: Machine learning tools can spot suspicious scripts faster.
Stronger browser protections: Browsers are improving security features to block malicious code.
Better third-party management: Tools to monitor and control external scripts are becoming standard.
Increased regulation: Governments are pushing for stricter data protection laws.

By staying informed and adopting new security measures, both users and website owners can reduce the impact of formjacking.

Conclusion

Formjacking is a hidden but serious cyber threat that steals your sensitive data from online forms. It works by injecting malicious code into websites, capturing your information without your knowledge. Because online shopping and payments are so common, formjacking attacks have grown rapidly.

You can protect yourself by using trusted websites, keeping your software updated, and monitoring your accounts. Website owners must also take strong security steps to prevent these attacks. Staying aware and cautious online is the best way to keep your data safe from formjacking.

FAQs

What is the main goal of formjacking?

The main goal of formjacking is to steal sensitive information like credit card numbers and login details by injecting malicious code into online forms.

How can I tell if a website is formjacked?

Look for unusual form behavior, slow loading times, unexpected pop-ups, or browser security warnings. Using security tools can also help detect malicious scripts.

Are all websites at risk of formjacking?

Any website with online forms can be at risk, especially e-commerce, payment portals, and login pages that handle sensitive data.

Can antivirus software protect me from formjacking?

Yes, antivirus and anti-malware software can detect some malicious scripts and protect you from formjacking attacks.

What should website owners do to prevent formjacking?

They should audit third-party scripts, implement Content Security Policy, keep software updated, use Web Application Firewalls, and monitor website traffic for suspicious activity.

What is Formjacking

Introduction