Open redirection (stored DOM-based)
Summary: PortSwigger describes stored DOM-based open redirection, which occurs when user input is stored and later written into a redirection target by a client-side script in an unsafe way. An attacker can then build a URL that, when visited by another user, redirects to an arbitrary external domain, and if the attacker controls the start of the string passed to the redirection API, a javascript: pseudo-protocol URL may escalate the flaw into JavaScript injection.
Key Takeaway: The redirect rides an authentic application URL with the correct domain and a valid SSL certificate, so users who check those features still will not notice the subsequent jump to a different domain - which is what makes it useful for phishing against your users.
Read the original at PortSwigger Research ↗
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- Vulnerabilities & Patching
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