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Detector Library

C# detectors (44/44)

Method Input Validation Password Complexity Xml External Entity Memory Marshal CreateSpan Cross-Site Request Forgery (CSRF)Module Injection Improper Cryptographic Signature Verification Obsolete Cryptography Inefficient Regular Expression Double Epsilon Equality Unrestricted File Upload Output Cache Conflicts Unsafe XSLT Setting Used Cross Site Scripting (XSS)Weak Cipher Algorithm Stack Trace Exposure XPath Injection Thread Safety Violation OS Command Injection Unvalidated Redirect Integer Overflow Avoid Persistent Cookies Untrusted Deserialization LDAP Injection Weak Random Number Generation SQL Injection Path Traversal Debug Binary Sensitive Information Leak Webconfig Trace Enabled Inter Process Write of RegionInfo Code Injection Missing Authorization JWT TokenValidationParameters No Expiry Razor Use of html string Server-Side Request Forgery (SSRF)Origins Verified Cross Origin Communications Prevent Excessive Authentication Improper Authentication Certificate Validation Disabled Insecure Cryptography Log Injection Mass Assignment Cookie Without SSL Flag

Cross Site Scripting (XSS) High

Cross Site Scripting (XSS) is an attack which exploits a web application or system to treat user input as markup or script code. It is important to encode the data depending on the specific context it is used in.

Detector ID

csharp/cross-site-scripting@v1.0

Category

Common Weakness Enumeration (CWE)

Tags

-

Noncompliant example

1[HttpGet]
2public string Get(string untrusted)
3{
4    // Noncompliant: Directly use untrusted data from input
5    return "value " + untrusted;
6}

Compliant example

1[HttpPost]
2[ValidateAntiForgeryToken]
3public string Post(string untrusted)
4{
5    // Compliant: Encode untrusted data before use
6    return "value " + HttpUtility.HtmlEncode(untrusted);
7}