Zephyr Project Manager Cross-site Scripting

The Zephyr Project Manager WordPress plugin before 3.2.55 does not have any authorisation as well as CSRF in all its AJAX actions, allowing unauthenticated users to call them either directly or via CSRF attacks. Furthermore, due to the lack of sanitisation and escaping, it could also allow them to perform Stored Cross-Site Scripting attacks against logged in admins. (2022-10-03, CVE-2022-2839)

A vulnerability, which was classified as problematic, was found in Zephyr Project Manager up to 3.2.4. Affected is an unknown function of the file /v1/tasks/create/ of the component REST Call Handler. The manipulation of the argument onanimationstart leads to cross site scripting. It is possible to launch the attack remotely. Upgrading to version 3.2.5 is able to address this issue. It is recommended to upgrade the affected component. VDB-209370 is the identifier assigned to this vulnerability. (2022-09-28, CVE-2022-3333)

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>