This article is a part of our Vulnerability Database (back to index)
Cross-site Scripting occurrences in Jpress
An issue was discovered in JPress v3.3.0 and below. There are XSS vulnerabilities in the template module and tag management module. If you log in to the background by means of weak password, the storage XSS vulnerability can occur. (2021-06-18, CVE-2021-33347)
XSS exists in JPress v1.0.4 via Markdown input, or Markdown input with the code input option. (2019-01-14, CVE-2019-6278)
In JPress v1.0-rc.5, there is stored XSS via each of the first three input fields to the starter-tomcat-1.0/admin/setting URI, as demonstrated by the web_name parameter. (2018-11-11, CVE-2018-19170)
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>