# Injection

> Injection vulnerability testing - SQL, NoSQL, OS Command, SSTI, XXE, and LDAP/XPath injection techniques.

- Skill: `transilienceai/injection` (Agent Skill, multi-file: 46 files)
- Install (CLI): `npx skillmds add transilienceai/injection`
- Raw SKILL.md: https://api.skillmd.com/api/skills/transilienceai/injection/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Data & Analytics
- Author: transilienceai (https://skillmd.com/u/transilienceai)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/transilienceai/injection

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# Injection

Test for injection vulnerabilities across all input vectors. Covers SQL, NoSQL, Command, SSTI, XXE, and LDAP injection.

## Techniques

| Type | Key Vectors |
|------|-------------|
| **SQL Injection** | In-band (union, error), Blind (boolean, time), Out-of-band |
| **NoSQL Injection** | Operator injection, JavaScript injection, aggregation pipeline |
| **Command Injection** | OS command separators, blind techniques, out-of-band |
| **SSTI** | Template engine detection, sandbox escape, RCE chains |
| **XXE** | Entity expansion, SSRF via XXE, blind XXE, parameter entities |
| **LDAP/XPath** | Filter manipulation, authentication bypass |

## Workflow

1. Identify injection points (parameters, headers, cookies, JSON fields)
2. Detect injection type with minimal probes
3. Exploit with context-appropriate payloads
4. Escalate (data extraction, RCE, file read)
5. Capture evidence and write PoC

## Reference

- `reference/sql-injection*.md` - SQL injection techniques
- `reference/nosql-injection*.md` - NoSQL injection techniques
- `reference/os-command-injection*.md` - OS command injection
- `reference/ssti*.md` - Server-side template injection
- `reference/xxe*.md` - XML external entity injection
- `reference/ldap-injection-quickstart.md` - LDAP filter injection: detection, auth bypass, blind boolean extraction via `(description=PREFIX*)` chaining
- `reference/xpath-injection-quickstart.md` - XPath injection (CWE-643): lxml/Java/Node sinks, `' or '1'='1' or 'a'='b` boolean oracle, blind char-by-char extraction recipe