Newspaper Cross-site Scripting

The Newspaper WordPress theme before 12 does not sanitise a parameter before outputting it back in an HTML attribute via an AJAX action, leading to a Reflected Cross-Site Scripting (2022-10-31, CVE-2022-2167)

The Newspaper WordPress theme before 12 does not sanitise a parameter before outputting it back in an HTML attribute via an AJAX action, leading to a Reflected Cross-Site Scripting. (2022-10-31, CVE-2022-2627)

An issue was discovered in the tagDiv Newspaper theme 10.3.9.1 for WordPress. It allows XSS via the wp-admin/admin-ajax.php td_block_id parameter in a td_ajax_block API call. (2021-07-19, CVE-2021-3135)

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>