Best of Web Security — June 2025

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   Article

   freeCodeCamp·50w

   How Attackers Steal Data from Websites (And How to Stop Them)

   Web attackers use various methods to steal data including phishing emails, SQL injection, cross-site scripting (XSS), brute force password attacks, malware, man-in-the-middle attacks, outdated software exploitation, and insecure API integrations. Defense strategies include user education, multi-factor authentication, input validation, HTTPS implementation, regular software updates, secure coding practices, and proper API security. The stolen data often ends up on the dark web where it's sold for identity theft and further attacks.

   188

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2. 2
   Article

   Astro·51w

   Astro 5.9

   Astro 5.9 introduces experimental Content Security Policy support using hash-based approach that works across static sites, serverless, and SPAs. The release adds renderMarkdown helper for content loaders, allows disabling default styles in responsive images for better Tailwind 4 compatibility, and enables adapters to suppress feature support logs. The CSP implementation generates meta elements with hashes for all scripts and styles, providing XSS protection without requiring server-side nonce generation.

   58

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   Article

   Laravel Dev·47w

   Why Laravel Developers Need to Think Like Hackers

   Laravel provides excellent security defaults like CSRF protection and input validation, but developers often break the security model through poor implementation. Hackers exploit assumptions by testing unexpected inputs, bypassing validation, and accessing hidden routes. To build truly secure applications, developers need to adopt a hacker mindset: assume the worst, test edge cases, audit trust boundaries, and validate data at multiple layers. The article demonstrates this with a file upload vulnerability example where a PHP file disguised as JPG bypassed validation and granted shell access.

   57

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   Article

   Tech Lead Digest·49w

   The Ultimate Guide to JWT Vulnerabilities and Attacks (with Exploitation Examples)

   JWT vulnerabilities pose serious security risks in modern web applications. Common attacks include signature bypass, algorithm confusion (switching from RS256 to HS256), weak secret brute-forcing, and injection attacks through header parameters like 'kid' and 'jku'. The guide covers exploitation techniques for each vulnerability type, from trivial signature removal to sophisticated ECDSA psychic signature attacks. Key defense strategies include strict algorithm validation, secure key management, input sanitization, and proper signature verification implementation.

   43

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5. 5
   Article

   Chrome Developers·49w

   HTML spec change: escaping < and > in attributes

   The HTML specification was updated to escape < and > characters in attributes when serializing DOM to HTML strings, helping prevent mutation XSS vulnerabilities. This change affects innerHTML, outerHTML, and getHTML() methods but doesn't impact HTML parsing or DOM APIs like getAttribute(). The update is rolling out in Chrome 138, Firefox 140, and Safari 26, potentially breaking code that relies on innerHTML/outerHTML for attribute extraction and end-to-end tests expecting unescaped characters.

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   Article

   freeCodeCamp·48w

   How to Choose a Web Application Firewall for Web Security

   Web Application Firewalls (WAFs) act as specialized security layers that filter malicious traffic targeting web applications, protecting against SQL injection, XSS attacks, and bot traffic. Five major WAF solutions are compared: Cloudflare offers easy deployment with free tier options, Imperva provides enterprise-grade features with compliance support, SafeLine delivers self-hosted control with semantic detection, Fortinet FortiWeb integrates with existing security ecosystems, and F5 Advanced WAF offers comprehensive protection for complex multi-cloud environments. The choice depends on factors like technical expertise, budget, compliance requirements, and existing infrastructure.

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   Article

   InfoSec Write-ups·48w

   Browser-in-the-Browser: The New Phishing Frontier

   Browser-in-the-Browser (BitB) attacks create pixel-perfect fake browser windows to steal credentials by mimicking legitimate login popups. These sophisticated phishing techniques exploit user trust in browser security indicators like HTTPS locks and familiar URLs. The article covers technical implementation details, advanced evasion methods, PWA abuse, detection strategies, and defense mechanisms including Content Security Policy configurations and behavioral analysis.

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