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Cross-site Scripting occurrences in Jquery-minicolors
A vulnerability was found in claviska jquery-minicolors up to 2.3.5. It has been rated as problematic. Affected by this issue is some unknown functionality of the file jquery.minicolors.js. The manipulation leads to cross site scripting. The attack may be launched remotely. Upgrading to version 2.3.6 is able to address this issue. The name of the patch is ef134824a7f4110ada53ea6c173111a4fa2f48f3. It is recommended to upgrade the affected component. VDB-215306 is the identifier assigned to this vulnerability. (2022-12-12, CVE-2021-4243)
Why Cross-site Scripting can be dangerous
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>