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When security features collide

portswigger.net | research | #web-security | #xss | #defense | #cloudflare | #portswigger | #waf-bypass | #security-features
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Summary

James Kettle argues stacked security features can make systems easier to exploit, demonstrating a Cloudflare email obfuscation quirk that bypasses its WAF and all browser XSS filters.
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Practical Web Cache Poisoning
James Kettle's whitepaper shows how to turn web caches into exploit delivery systems, hijacking JavaScript and poisoning responses across popular sites, plus defenses and open source tooling.
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