csharp/ql/src/Security Features/CWE-022/TaintedPath.ql

/**
 * @name Uncontrolled data used in path expression
 * @description Accessing paths influenced by users can allow an attacker to access unexpected resources.
 * @kind path-problem
 * @problem.severity error
 * @security-severity 7.5
 * @precision high
 * @id cs/path-injection
 * @tags security
 *       external/cwe/cwe-022
 *       external/cwe/cwe-023
 *       external/cwe/cwe-036
 *       external/cwe/cwe-073
 *       external/cwe/cwe-099
 */

import csharp
import semmle.code.csharp.security.dataflow.TaintedPathQuery
import TaintedPath::PathGraph

from TaintedPath::PathNode source, TaintedPath::PathNode sink
where TaintedPath::flowPath(source, sink)
select sink.getNode(), source, sink, "This path depends on a $@.", source.getNode(),
  "user-provided value"