Citybook Cross-site Scripting

The CTHthemes CityBook before 2.3.4, TownHub before 1.0.6, and EasyBook before 1.2.2 themes for WordPress allow nsecure Direct Object Reference (IDOR) via wp-admin/admin-ajax.php to delete any page/post/listing. (2020-01-13, CVE-2019-20209)

The CTHthemes CityBook before 2.3.4, TownHub before 1.0.6, and EasyBook before 1.2.2 themes for WordPress allow Persistent XSS via Listing Address, Listing Latitude, Listing Longitude, Email Address, Description, Name, Job or Position, Description, Service Name, Address, Latitude, Longitude, Phone Number, or Website. (2020-01-13, CVE-2019-20211)

The CTHthemes CityBook before 2.3.4, TownHub before 1.0.6, and EasyBook before 1.2.2 themes for WordPress allow Persistent XSS via the chat widget/page message form. (2020-01-13, CVE-2019-20212)

The CTHthemes CityBook before 2.3.4, TownHub before 1.0.6, and EasyBook before 1.2.2 themes for WordPress allow Reflected XSS via a search query. (2020-01-13, CVE-2019-20210)

Cross site scripting is an attack where a web page executes code that is injected by an adversary. It usually appears, when users input is presented. This attack can be used to impersonate a user, take over control of the session, or even steal API keys.

The attack can be executed e.g. when you application injects the request parameter directly into the HTML code of the page returned to the user:

https://server.com/confirmation?message=Transaction+Complete

what results in:

<span>Confirmation: Transaction Complete</span>

In that case the message can be modified to become a valid Javascript code, e.g.:

https://server.com/confirmation?message=<script>dangerous javascript code here</script>

and it will be executed locally by the user's browser with full access to the user's personal application/browser data:

<span>Confirmation: <script>dangerous javascript code here</script></span>