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New Published Rules - skajedevel_personal_org.xpath-injection-copy #3713

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33339fa
add skajedevel_personal_org/xpath-injection-copy.yaml
SkajeDev Nov 23, 2025
a32b459
add skajedevel_personal_org/xpath-injection-copy.cs
SkajeDev Nov 23, 2025
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89 changes: 89 additions & 0 deletions skajedevel_personal_org/xpath-injection-copy.cs
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public List<Knowledge> Search1(string input)
{
List<Knowledge> searchResult = new List<Knowledge>();
var webRoot = _env.WebRootPath;
var file = System.IO.Path.Combine(webRoot,"Knowledgebase.xml");

XmlDocument XmlDoc = new XmlDocument();
XmlDoc.Load(file);

XPathNavigator nav = XmlDoc.CreateNavigator();
// ruleid: xpath-injection
XPathExpression expr = nav.Compile(@"//knowledge[tags[contains(text(),'" + input + "')] and sensitivity/text() ='Public']");
}

public List<Knowledge> Search2(string input)
{
List<Knowledge> searchResult = new List<Knowledge>();
//string input;
var webRoot = _env.WebRootPath;
var file = System.IO.Path.Combine(webRoot,"Knowledgebase.xml");

XmlDocument XmlDoc = new XmlDocument();
XmlDoc.Load(file);

XPathNavigator nav = XmlDoc.CreateNavigator();
// ok: xpath-injection
XPathExpression expr = nav.Compile(@"//knowledge[tags[contains(text(),'keyword')] and sensitivity/text() ='Public']");

var matchedNodes = nav.Select(expr);
}

public List<Knowledge> Search3(string input)
{
List<Knowledge> searchResult = new List<Knowledge>();
var webRoot = _env.WebRootPath;
var file = System.IO.Path.Combine(webRoot, "Knowledgebase.xml");

XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(file);

XPathNavigator nav = xmlDoc.CreateNavigator();
// ruleid: xpath-injection
XPathExpression expr = nav.Compile($@"//knowledge[tags[contains(text(),'{input}')] and sensitivity/text()='Public']");

XPathNodeIterator nodes = nav.Select(expr);
}


public List<Knowledge> Search4(string input)
{
List<Knowledge> searchResult = new List<Knowledge>();
var webRoot = _env.WebRootPath;
var file = System.IO.Path.Combine(webRoot,"Knowledgebase.xml");

XmlDocument XmlDoc = new XmlDocument();
XmlDoc.Load(file);

XPathNavigator nav = XmlDoc.CreateNavigator();
// ruleid: xpath-injection
Object expr = nav.Select(@"//knowledge[tags[contains(text(),'" + input + "')] and sensitivity/text() ='Public']");
}

public List<Knowledge> Search5(string input)
{
List<Knowledge> searchResult = new List<Knowledge>();
var webRoot = _env.WebRootPath;
var file = System.IO.Path.Combine(webRoot,"Knowledgebase.xml");

XmlDocument XmlDoc = new XmlDocument();
XmlDoc.Load(file);

XPathNavigator nav = XmlDoc.CreateNavigator();
// ruleid: xpath-injection
var expr = nav.Select($@"//knowledge[tags[contains(text(),'{input}')] and sensitivity/text()='Public']");
}

public List<Knowledge> Search6(string input)
{
List<Knowledge> searchResult = new List<Knowledge>();
var webRoot = _env.WebRootPath;
var file = System.IO.Path.Combine(webRoot,"Knowledgebase.xml");

XmlDocument XmlDoc = new XmlDocument();
XmlDoc.Load(file);

XPathNavigator nav = XmlDoc.CreateNavigator();
// ruleid: xpath-injection
var expr = nav.SelectSingleNode($@"//knowledge[tags[contains(text(),'{input}')] and sensitivity/text()='Public']");
}
52 changes: 52 additions & 0 deletions skajedevel_personal_org/xpath-injection-copy.yaml
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rules:
- id: xpath-injection-copy
message: XPath queries are constructed dynamically on user-controlled input. This
vulnerability in code could lead to an XPath Injection exploitation.
severity: ERROR
metadata:
likelihood: MEDIUM
impact: MEDIUM
confidence: MEDIUM
category: security
cwe:
- 'CWE-643: Improper Neutralization of Data within XPath Expressions (''XPath
Injection'')'
owasp:
- A03:2021 - Injection
references:
- https://owasp.org/Top10/A03_2021-Injection/
- https://cwe.mitre.org/data/definitions/643.html
subcategory:
- vuln
technology:
- .net
license: Semgrep Rules License v1.0. For more details, visit semgrep.dev/legal/rules-license
vulnerability_class:
- XPath Injection
languages:
- csharp
mode: taint
pattern-sources:
- pattern-either:
- pattern: $T $M($INPUT,...) {...}
- pattern: |
$T $M(...) {
...
string $INPUT;
}
pattern-sinks:
- pattern-either:
- pattern: XPathExpression $EXPR = $NAV.Compile("..." + $INPUT + "...");
- pattern: XPathExpression $EXPR = $NAV.Compile($"...{$INPUT}...");
- pattern: var $EXPR = $NAV.Compile("..." + $INPUT + "...");
- pattern: var $EXPR = $NAV.Compile($"...{$INPUT}...");
- pattern: XPathNodeIterator $NODE = $NAV.Select("..." + $INPUT + "...");
- pattern: XPathNodeIterator $NODE = $NAV.Select($"...{$INPUT}...");
- pattern: var $NODE = $NAV.Select("..." + $INPUT + "...");
- pattern: var $NODE = $NAV.Select($"...{$INPUT}...");
- pattern: var $NODE = $NAV.SelectSingleNode("..." + $INPUT + "...");
- pattern: var $NODE = $NAV.SelectSingleNode($"...{$INPUT}...");
- pattern: Object $OBJ = $NAV.Evaluate("..." + $INPUT + "...");
- pattern: Object $OBJ = $NAV.Evaluate($"...{$INPUT}...");
- pattern: var $OBJ = $NAV.Evaluate("..." + $INPUT + "...");
- pattern: var $OBJ = $NAV.Evaluate($"...{$INPUT}...");
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