A WAF (Web Application Firewall) operates at the perimeter, analyzing traffic as it crosses between external networks and your internal network towards your web servers. The browser environment is a separate execution context that happens on your users' devices, completely outside your network perimeter. Once JavaScript code reaches the browser and begins to execute, it's operating in an environment that your WAF has no visibility into or control over. By design, a WAF is ineffective against client-side threats.
Can cside work alongside my existing WAF without conflicts?
We monitor an entirely different dimension of the application stack; hence, there is no interference.
How does cside solve the client-side blind spot that WAFs can't address?
Cside analyses every third-party script on our side before it runs, making it easy to stop attacks by analyzing JavaScript content asynchronously and hashing a list of bad scripts, preventing them from being loaded again.
Can a WAF protect against supply chain attacks on third-party JavaScript libraries?
WAFs cannot protect against client-side supply chain attacks because they don't intercept the fetch to the 3rd party endpoint and therefore have no visibility into the JavaScript files from the 3rd party sources.
How do conditional client-side attacks avoid WAF detection?
Sophisticated client-side attacks use conditional logic that only triggers under specific circumstances - certain geographic locations, specific times, or particular user behaviors.