CM-AD-Changer XSS Vulnerability

## FULL DISCLOSURE

#Product : cm-ad-changer
#Exploit Author : Rahul Pratap Singh
#Version :1.7.2
#Home page Link : https://wordpress.org/plugins/cm-ad-changer/
#Website : 0x62626262.wordpress.com
#Linkedin : https://in.linkedin.com/in/rahulpratapsingh94
#Date : 21/4/2016

XSS Vulnerability:

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Description:
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Following  parameters are not sanitized that leads to XSS Vulnerability.

title, comment, link
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Vulnerable Code:
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File Name: testfiles/cm-ad-changer/backend/views/admin_settings.php
Found at line:61
<input type="checkbox" name="acs_active" id="acs_active" value="1" <?php
echo ($fields_data['acs_active'] == '1' ? 'checked=checked' : '') ?> />
Found at line:73
<textarea id="acs_custom_css" name="acs_custom_css" rows=7 value="<?php
echo stripslashes($fields_data['acs_custom_css']) ?>"><?php echo
stripslashes($fields_data['acs_custom_css']) ?></textarea>

File Name: testfiles/cm-ad-changer/backend/views/admin_campaigns.php
Found at line:96
<textarea value="<?php echo (isset($fields_data['comment']) ?
stripslashes($fields_data['comment']) : '') ?>" name="comment"
id="comment"><?php echo (isset($fields_data['comment']) ?
stripslashes($fields_data['comment']) : '') ?></textarea>

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POC:
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https://0x62626262.files.wordpress.com/2016/04/cm-ad-changer-xss-poc.png
https://0x62626262.files.wordpress.com/2016/04/cm-ad-changer-xss-poc1.png

Fix:
Update to 1.7.6

Vulnerability Disclosure Timeline:
→ March 14, 2016  – Bug discovered, initial report to Vendor.
→ March 22, 2016  – No Response. Report sent again.
→ March 23, 2016  – WordPress Acknowledged.
→ April 21, 2016  – Full Disclosure.

Pub Ref:
https://0x62626262.wordpress.com/2016/04/21/cm-ad-changer-xss-vulnerability/
https://ad-changer.cminds.com/cm-ad-changer-plugin-free-edition-release-notes/