This article is a part of our Vulnerability Database (back to index)
Cross-site Scripting occurrences in Platform
In platform before version 9.4.4, inline attributes are not properly escaped. If the data that came from users was not escaped, then an XSS vulnerability is possible. The issue was introduced in 9.0.0 and fixed in 9.4.4. (2020-10-19, CVE-2020-15263)
Pega Platform before version 8.2.6 is affected by a Stored Cross-Site Scripting (XSS) vulnerability in the comment tags. (2020-04-29, CVE-2020-8775)
The Richtext Editor in Pega Platform before 8.2.6 is affected by a Stored Cross-Site Scripting (XSS) vulnerability. (2020-04-29, CVE-2020-8773)
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>