"Think your WAF has you covered? Think again. This holiday season, unmonitored JavaScript is a critical oversight allowing attackers to steal payment data while your WAF and intrusion detection systems see nothing. With the 2025 shopping season weeks away, visibility gaps must close now. Get the complete Holiday Season Security Playbook here. Bottom Line Up Front The 2024 holiday season saw major attacks on website code: the Polyfill.io breach hit 500,000+ websites, and September's Cisco Magecart attack targeted holiday shoppers."
"Limited Visibility: Server-side monitoring tools cannot observe JavaScript execution within users' browsers. WAFs and network monitoring solutions miss attacks that operate entirely in the client environment. Encrypted Traffic: Modern web traffic is encrypted via HTTPS, making it difficult for network monitoring tools to inspect the content of data transmissions to third-party domains. Dynamic Nature: Client-side code can modify its behavior based on user actions, time of day, or other factors,"
Unmonitored client-side JavaScript enables attackers to steal payment and personal data while server-side defenses remain blind. The 2024 holiday season experienced major website-code compromises, including the Polyfill.io breach affecting over 500,000 sites and a September Magecart attack, with attacks increasing 690% during peak shopping. Web application firewalls, intrusion detection systems, and network monitoring cannot observe JavaScript executing in user browsers, cannot inspect encrypted HTTPS traffic to third-party domains, and cannot accurately detect code that adapts dynamically to users. Retailers must close browser-side visibility gaps, vet and monitor third-party scripts, and deploy client-side controls before the 2025 season.
Read at The Hacker News
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