My latest blog post is live! Check your Ruby on Rails applications for the use of params[:_json]

nastystereo.com/security/rai...

My latest blog post is live 🔥 Read it to learn what SafeMarshal is and *two* very different ways to escape and get RCE!

Read it to find out why Date is *not* a safe class in Ruby or how to leverage serialized strings being constructed with string concatenation!

nastystereo.com/security/rub...

I hope to write a follow up post that covers the footguns I learnt about for R apps, especially jsonlite::fromJSON ;)

New blog post is up!
Shiny Vulnerabilities in R's Most Popular Web Framework
nastystereo.com/security/r-s...

Turns out the programming language R is used for more than statistics, including web apps!

My latest blog post is live! nastystereo.com/security/cro...

Read how to send a cross-site POST without including a Content-Type header (without CORS). It even works with navigator.sendBeacon

I just published a new blog post sharing an improved Deserialization Gadget Chain for Ruby!
It builds on the work of others, including Leonardo Giovanni, @ulldma.bsky.social and @vakzz.bsky.social

nastystereo.com/security/rub...