WordPress 4.8 Ait-ThemesClub TemplatePreview 1.8.1 RFI Redir

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# Exploit Title : WordPress 4.8 Ait-ThemesClub TemplatePreview 1.8.1 RFI Open Redirection
# Author [ Discovered By ] : KingSkrupellos
# Team : Cyberizm Digital Security Army
# Date : 28/03/2019
# Vendor Homepage : ait-themes.club
# Software Information Link : ait-themes.club/wordpress-themes/
ait-themes.club/documentation/
themeforest.net/user/lumbermandesigns
# Software Affected Version : WordPress Version 4.8 - 5.1.1 - Theme Version 1.8.1
# Tested On : Windows and Linux
# Category : WebApps
# Exploit Risk : High
# Google Dorks : inurl:/template-preview.php?url=
# Vulnerability Type :
CWE-601 [ URL Redirection to Untrusted Site ('Open Redirect') ]
CWE-98 [ Improper Control of Filename for Include
/Require Statement in PHP Program ('PHP Remote File Inclusion') ]
# PacketStormSecurity : packetstormsecurity.com/files/authors/13968
# CXSecurity : cxsecurity.com/author/KingSkrupellos/1/
# Exploit4Arab : exploit4arab.org/author/351/KingSkrupellos
# Reference Link : cxsecurity.com/issue/WLB-2019030237

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# Impact :
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* WordPress 4.8 Ait-ThemesClub TemplatePreview 1.8.1 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.

*The PHP application receives input from an upstream component, but it does not

restrict or incorrectly restricts the input before its usage in "require," "include," or similar functions.

* In certain versions and configurations of PHP, this can allow an attacker to

specify a URL to a remote location from which the software will obtain the code to execute.

In other cases in association with path traversal, the attacker can specify a local file

that may contain executable statements that can be parsed by PHP.

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# Open Redirection Exploit :
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/template-preview.php?url=[BASE-64 Encoded URL]

/template-preview.php?url=aHR0cHM6Ly9jeHNlY3VyaXR5LmNvbS8=

Note : Convert any random desired redirection address into the Base64 Encoded Link.

Example 1 => aHR0cHM6Ly9jeHNlY3VyaXR5LmNvbS8=   stands for cxsecurity.com

Example 2 => aHR0cHM6Ly93d3cuY3liZXJpem0ub3JnLw==   stands for cyberizm.org

Example 3 => aHR0cDovL2V4cGxvaXQ0YXJhYi5vcmcv   stands for exploit4arab.org

Example 4 => aHR0cHM6Ly9wYWNrZXRzdG9ybXNlY3VyaXR5LmNvbS8=  stands for packetstormsecurity.com

Useable Base64 Encoder - Decoder Links :
base64decode.org
base64encode.org

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# Example Vulnerable Sites :
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[+] messagizer.com/template-preview.php?url=aHR0cHM6Ly9jeHNlY3VyaXR5LmNvbS8=

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# Discovered By KingSkrupellos from Cyberizm.Org Digital Security Team

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