Simon Willison’s Weblog

XSS. Sanitising HTML is an extremely hard problem. The sanitize helper that ships with Rails is completely broken; Jacques Distler provides a better alternative.

Posted 12th March 2007 at 12:34 am

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

jacques-distler 1 rails 72 security 537 xss 60

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