WordPress 4.9.10 ButterKekse Plugins Open Redirection

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# Exploit Title : WordPress 4.9.10 ButterKekse Plugins Open Redirection
# Author [ Discovered By ] : KingSkrupellos
# Team : Cyberizm Digital Security Army
# Date : 29/03/2019
# Vendor Homepage : bananensaft.com - wordpress.org
# Version : WordPress 4.9.10
# Tested On : Windows and Linux
# Category : WebApps
# Exploit Risk : High
# Google Dorks : inurl:/wp-content/plugins/butterkekse/
# 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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# Impact :
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WordPress ButterKekse Plugins 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 :
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/redirector.php

# Vulnerable Parameter :
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?url=

# Open Redirection Exploit :
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/wp-content/plugins/butterkekse/redirector.php?url=https://www.[REDIRECTION].gov

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# Example Vulnerable Sites :
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[+] bananensaft.com/wp-content/plugins/butterkekse/redirector.php?url=https://cxsecurity.com/

[+] kokos-wasser.info/wp-content/plugins/butterkekse/redirector.php?url=https://cxsecurity.com/

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# Discovered By KingSkrupellos from Cyberizm.Org Digital Security Team

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