Individual skill

web-cypher-injection

Inject into Neo4j Cypher queries to bypass auth, exfiltrate graph data, and reach SSRF/RCE. Load when user input reaches a Cypher query (Neo4j-backed app, GraphQL/REST over a graph DB) — a login, search, or filter that builds `MATCH (n {prop:'<input>'})`. Signals: Neo4j/Bolt (7687), `MATCH`/ `RETURN` in errors, `neo4j` cookies/stack traces, apoc procedures, a graph-backed search field.

skills/web/web-cypher-injection/SKILL.md

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Last checked: Nov 7, 2026

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Repository stars (not skill ratings): 27
Repository last updated: Oct 14, 2026
License: MIT

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# Cypher injection (Neo4j)

## When it applies
An app builds a Neo4j **Cypher** query by concatenating user input — a login
(`MATCH (u {name:'<in>', pass:'<in>'})`), a search, or a filter. Like SQLi, mixing input into the
query language lets you change its meaning: bypass auth, read arbitrary nodes, or pivot to SSRF/RCE
via Cypher's data-loading and (mis)installed `apoc` procedures.

## Why it works
Cypher is a query language with the same code/data confusion as SQL, plus graph-specific power:
`UNION` across labels, `LOAD CSV FROM <url>` (server-side fetch = SSRF), and — if `apoc` is present
and permissive — `apoc.load.*` / `dbms.*` that can reach the network or the OS.

## Method