Overview
Stored XSS via User Agent focuses on request metadata that is logged by the application and later displayed in a web interface.
This lab shows that stored XSS is not limited to visible form fields. Values collected from HTTP headers, analytics records, or operational logs can also become dangerous when rendered in an administrative page without safe encoding.
Security Impact
Stored XSS in log or analytics views can affect administrators and support staff who review captured requests. The impact can be higher than ordinary user-facing XSS because privileged users often view operational dashboards.
Vulnerability Scope
Access logs, user-agent dashboards, audit trails, security monitoring views, CRM activity feeds, and admin panels are exposed when request metadata is rendered as trusted content.
Lab Focus
The lab focuses on looking beyond form input, tracing header-derived data into stored views, and applying the same output encoding discipline to internal dashboards as public pages.
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