WordPress 4.9.x Concise Themes Open Redirection

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# Exploit Title : WordPress 4.9.x Concise Themes Open Redirection
# Author [ Discovered By ] : KingSkrupellos
# Team : Cyberizm Digital Security Army
# Date : 15/03/2019
# Vendor Homepage : concise.co.jp
# Software Information Link :
themeforest.net/item/concise/66396
concise.co.jp/products/
# Software Affected Version : 3.x - 4.8.9 - 4.9.x
# Software Price Type : Paid Download - 44$
# Tested On : Windows and Linux
# Category : WebApps
# Exploit Risk : High
# Vulnerability Type : CWE-601 [ URL Redirection to Untrusted Site ('Open Redirect') ]
# PacketStormSecurity : packetstormsecurity.com/files/authors/13968
# CXSecurity : cxsecurity.com/author/KingSkrupellos/1/
# Exploit4Arab : exploit4arab.org/author/351/KingSkrupellos

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# Information About Software :
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Concise is a very easy to customize theme which best suits business or portfolio sites.

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# Impact :
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This web application WordPress Concise Themes accepts a user-controlled input that specifies a link to an external site,

and uses that link in a Redirect. This simplifies phishing attacks. An http parameter may contain a URL value and

could cause the web application to redirect the request to the specified URL. By modifying the URL value to a

malicious site, an attacker may successfully launch a phishing scam and steal user credentials. Because the server name

in the modified link is identical to the original site, phishing attempts have a more trustworthy appearance.

Open redirect is a failure in that process that makes it possible for attackers to steer users to malicious websites.

This vulnerability is used in phishing attacks to get users to visit malicious sites without realizing it. Web users often

encounter redirection when they visit the Web site of a company whose name has been changed or which has been

acquired by another company. Visiting unreal web page user's computer becomes affected by malware the task of

which is to deceive the valid actor and steal his personal data.

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# Vulnerable File :  go.php
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# Vulnerable Parameter : ?url=
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# Open Redirection Exploit :
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/wp-content/themes/concise/includes/go.php?url=https://www.[REDIRECTION-ADDRESS].gov

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# Example Vulnerable Sites :
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[+]  yuqiren.com/wp-content/themes/concise/includes/go.php?url=https://cxsecurity.com/

[+]  huangmingyan.com/wp-content/themes/concise/includes/go.php?url=https://cxsecurity.com/

[+]  qblog.org/wp-content/themes/concise/includes/go.php?url=https://cxsecurity.com/

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# Discovered By KingSkrupellos from Cyberizm.Org Digital Security Team

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