CLOUD4WI SPLASH PORTAL REFLECTED XSS VULNERABILITY – CVE-2015-4699

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CLOUD4WI SPLASH PORTAL Reflected XSS vulnerability
Quantum Leap Advisory: CLOUD4WI SPLASH PORTAL Reflected XSS vulnerability – Adivsory # CVE-2015-4699
Affected Product: CLOUD4WI SPLASH PORTAL
Credits: Vulnerability discovered by Agostino Parentela of Quantum Leap s.r.lExecutive SummaryUsing a specially crafted 
HTTP request, it is possible to exploit a lack in the neutralization of the pages output which includes the user 
submitted content. Successful exploitation of the vulnerabilities, results in the execution of arbitrary HTML and 
script code in user’s browser in context of the vulnerable web application trough a “Reflected XSS”.Proof of ConceptIt 
has been discovered a reflected XSS vulnerability on to ControlPanel  page in Cloud4wi Splash Portal. Below you can 
find a proof of concept of the vulnerability: go to “Forgot your credentials?” pageAfter compile form of username and 
submit the request, the server return a message of error because “Invalid username” with the URL 
“?recovery=1&recoveryMessage=Invalid%20username”. Here it’s possibile to inject a malicius code.GET 
/?recovery=1&amp;recoveryMessage=Invalid%20username”);><script>alert(“XSS”);</script> HTTP/1.1
Host: controlpanel.cloud4wi.com
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:37.0) Gecko/20100101 Firefox/37.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: it-IT,it;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Connection: keep-aliveFigure 1 shows the arbitrary code executed in the user browser context.SolutionTo fix the 
security issue we recommend to update at new version 5.9.7, the vendor has resolved this issue.Disclosure 
Timeline29/04/2015 – Vulnerability Discovered
08/05/2015 – Initial vendor notification
30/07/2015 – The vendor fixed the vulnerability
04/08/2015 – Public advisoryReferences[1] 
https://www.owasp.org/index.php/XSS_(Cross_Site_Scripting)_Prevention_Cheat_Sheet
[2] https://cloud4wi.zendesk.com/hc/en-us/articles/204956829-Cloud4Wi-5-9-7-Release-Note

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