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

The Summer of Johann: prompt injections as far as the eye can see - 15th August 2025
Open weight LLMs exhibit inconsistent performance across providers - 15th August 2025
LLM 0.27, the annotated release notes: GPT-5 and improved tool calling - 11th August 2025

ajax 61 atmediaajax 2 atmediaajax08 1 csrf 49 javascript 718 security 537 speaking 117 my-talks 90 xss 60 recovered 213

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