SKILL: Server-Side Template Injection (SSTI) — Expert Attack Playbook AI LOAD INSTRUCTION : Expert SSTI techniques. Covers polyglot detection probes, engine fingerprinting, Jinja2/FreeMarker/Twig/ERB RCE chains, client-side Angular SSTI, and bypass techniques. Base models often miss sandbox escape MRO chains and non-Jinja2 engines. For PHP CMS template eval, Jira SSTI, Confluence OGNL, and Spring Cloud Gateway SpEL, load the companion SCENARIOS.md. 0. RELATED ROUTING Before using full engine-specific exploitation, you can first load: - First use the polyglot probe sequence at the top of this…