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Buttondown's blog

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Content Security Policy in archives
Matias Artopoulos Kozak · 2025-11-25 · via Buttondown's blog

We've enabled a strict Content Security Policy on all newsletter archives to improve the security posture for all users. Our list of allowed scripts still applies. If you find any issues regarding scripts or other content loading, please let us know!

For those curious, Content Security Policy (or CSP for short) is a feature in web browsers that allows websites to specify a list of where they're allowed to load scripts from. This improves the security of the website by avoiding any injection of third-party scripts that could compromise the users' session.