Webhooks

Zapier integrations look harmless until you remember what they really do: move untrusted data between systems at high speed. Names, emails, form answers, ticket content, CRM notes, webhook payloads, markdown blobs, HTML snippets — it all gets piped around and eventually lands in somebody’s UI. That’s where teams get burned. They think, “Zapier just passes data through,” and forget that passthrough data becomes dangerous the moment they render it in a browser, email preview, admin panel, or embedded app. ...

IFTTT applets look harmless right up until they start moving untrusted data between services. That’s the trap. A lot of teams treat automation glue as “not really part of the app,” then they pipe data from webhooks, email subjects, calendar titles, tweets, form submissions, or IoT device names straight into admin dashboards, notification centers, internal portals, and support tools. That’s where XSS shows up. The IFTTT side usually isn’t the vulnerable part. The bug tends to land in the system that consumes applet output. ...