Server-Side Request Forgery (SSRF) here
Cross-Site Request Forgery (CSRF) here
Cross-Site Scripting (XSS) here
XML External Entity (XXE) here
Stored Procedure & Prepared Statement here
OAuth works and Attack here
SAML working and attacks here
Scenario Based Question here
WebView here
SSTI & CSTI Injection here
Challenging-AppSec-Question here