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a hands-on bug bounty training guide for keycloak identity and access management. covers protocol foundations, fingerprinting, auth flow exploitation, token attacks, SSRF, account takeover chains, and more.
Most XSS bugs are obvious: unescaped input, wrong function, move on. This one wasn't. I dove into a conditional branch that only fires when an author has no URL, outputting data that absolutely shouldn't. This is a full technical walkthrough: from recon to PoC that takes a Contributor account to Admin XSS.