Hackers Exploit CAPTCHA Trick on Webflow to Deliver Phishing Attacks

In today’s ever evolving cyber threat landscape, attackers are finding innovative ways to bypass traditional security measures. One recent method exploits Webflow’s trusted infrastructure and a fake CAPTCHA page, to execute a common credential phishing attack. In this post, we break down how this new attack works and provide actionable steps to protect yourself and your organization.

How the Attack Works

Hackers are exploiting the trust we may have in a common webhosting platform called Webflow.  Hackers create a fraudulent web page that appears legitimate, and boost that legitimacy with the following tactics:

• Fake CAPTCHA Verification – Victims are directed to a phishing page that mimics a CAPTCHA verification screen. This adds a layer of legitimacy and lowers some user’s suspicion.
• Credential Harvesting – Once the CAPTCHA is “verified,” users are prompted to enter their login credentials. If they do, they are  unknowingly handing them over to attackers.
• Bypassing Security Measures – Because Webflow is a reputable platform, phishing pages hosted on it may not be flagged as malicious, allowing them to bypass security filters and email protections users might have come to rely on.
• Data Exfiltration – Stolen credentials are sent to remote servers controlled by attackers, potentially leading to unauthorized access, financial fraud, data theft, and additional cyber attacks and intrusions.

Why This is So Dangerous

• Trust Exploitation – Since Webflow is a widely used platform for website hosting, users may not question the legitimacy of the phishing pages.
• Security Bypass – Many traditional email security filters do not flag Webflow-hosted domains as malicious, allowing phishing emails containing these links to slip through.
• Targeted Attacks – Attackers can customize these phishing campaigns to target specific industries, organizations, or high-value individuals.

How to Protect Yourself

1. Verify URLs Carefully – Always check the full URL before entering credentials, even if a website looks legitimate.
2. Enable Multi-Factor Authentication (MFA) – Even if credentials are stolen, MFA adds an extra layer of protection against unauthorized logins.
3. Beware of CAPTCHA Phishing Tactics – Be cautious if a CAPTCHA verification screen appears unexpectedly, especially before a login prompt.
4. Use Email Security Solutions – Organizations should deploy advanced email security filters that can detect and block phishing links, even from trusted platforms.
5. Educate Employees and Users – Regular cybersecurity awareness training can help users recognize and avoid sophisticated phishing attempts.
6. Test Users with Positive Phishing Simulations – regularly train end users with phishing simulations that are realistic (typo-squatted sender domain), ensuring that everyone is tested each and every time you send phishing simulations out to employees. Pro Tip: CyberHoot can deliver phishing simulations that ensure 100% user participation.

Conclusion

To safeguard your organization, ensure that you verify URLs, enforce multi-factor authentication, and regularly educate your team on emerging threats such as fake CAPTCHA security pages designed to build artificial trust. For more insights on advanced cybersecurity measures, subscribe to our newsletter or contact our experts at CyberHoot today.

Cybercriminals are continuously evolving, and staying informed is your best defense. With proactive measures and CyberHoot’s cutting-edge solutions, you can secure your digital environment against these new phishing tactics.