A security analyst has identified that Cross-Site Scripting (XSS) vulnerabilities are present on a company's customer portal. What is the most effective control to mitigate these vulnerabilities?
Output encoding
Routine patching
Network segmentation
Disabling JavaScript on the client-side
The most effective control to mitigate Cross-Site Scripting (XSS) vulnerabilities is to use output encoding. Output encoding ensures that any data rendered in a web browser is safely encoded, preventing malicious scripts from being executed. While input validation is also important, output encoding directly addresses the risk posed by XSS attacks by neutering any embedded scripts.
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