Following research done by James Kettle from PortSwigger on web cache poisoning, Snyk’s Security Team decided to deepen our knowledge in this field and to explore these vulnerabilities in the open source domain. We focused our research on the most popular web frameworks both in npm and PyPi, such as Flask (Werkzeug), Bottle, Tornado, and DerbyJS.
This blog post provides an introduction to web cache poisoning and demonstrates why open source maintainers should take this issue into account. Furthermore, this blog provides vulnerability examples within well known open source frameworks that were found to be vulnerable during Snyk’s initial research.
FleTime
