This article is a part of our Vulnerability Database (back to index)
Cross-site Scripting occurrences in Experience Manager Forms
The AEM Forms add-on for versions 6.5.5.0 (and below) and 6.4.8.2 (and below) are affected by a stored XSS vulnerability that allows users with 'Author' privileges to store malicious scripts in fields associated with the Sites component. These scripts may be executed in a victim’s browser when they open the page containing the vulnerable field. (2020-09-10, CVE-2020-9732)
Adobe Experience Manager Forms versions 6.3-6.5 have a reflected cross-site scripting vulnerability. Successful exploitation could lead to sensitive information disclosure. (2019-10-22, CVE-2019-8089)
Adobe Experience Manager Forms versions 6.2, 6.3 and 6.4 have a stored cross-site scripting vulnerability. Successful exploitation could lead to sensitive information disclosure. (2019-05-29, CVE-2019-7129)
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>