Gibbon Cross-site Scripting

Multiple cross-site scripting (XSS) vulnerabilities in the component outcomes_addProcess.php of Gibbon CMS v22.0.01 allow attackers to execute arbitrary web scripts or HTML via a crafted payload insterted into the name, category, description parameters. (2022-02-03, CVE-2022-23871)

Gibbon CMS v22.0.01 was discovered to contain a cross-site scripting (XSS) vulnerability, that allows attackers to inject arbitrary script via name parameters. (2022-01-28, CVE-2022-22868)

Gibbon v22.0.00 suffers from a stored XSS vulnerability within the wall messages component. (2021-09-13, CVE-2021-40214)

A reflected XSS vulnerability exists in multiple pages in version 22 of the Gibbon application that allows for arbitrary execution of JavaScript (gibbonCourseClassID, gibbonPersonID, subpage, currentDate, or allStudents to index.php). (2021-09-03, CVE-2021-40492)

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>