Simon Willison’s Weblog

When Ajax Attacks! Web application security fundamentals. Slides and (other people’s) notes from my presentation at @media Ajax on Tuesday.

Posted 17th September 2008 at 11:18 pm

Recent articles

OpenAI are quietly adopting skills, now available in ChatGPT and Codex CLI - 12th December 2025
GPT-5.2 - 11th December 2025
Useful patterns for building HTML tools - 10th December 2025

ajax 61 atmediaajax 2 atmediaajax08 1 csrf 53 javascript 727 security 569 speaking 117 my-talks 90 xss 60 recovered 213

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe