Cross site scripting (XSS) in ASP.NET via ResolveUrl

Description

Cross-site Scripting (XSS) refers to client-side code injection attack wherein an attacker can execute malicious scripts into a legitimate website or web application. XSS occurs when a web application makes use of unvalidated or unencoded user input within the output it generates.

Some ASP.NET web applications that use the Control.ResolveUrl method to resolve app-root-relative paths are vulnerable to XSS.

Remediation

Apply context-dependent encoding and/or validation to user input rendered on a page

References

Related Vulnerabilities

Severity

Classification

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