This article is a part of our Vulnerability Database (back to index)
Cross-site Scripting occurrences in Warnings Next Generation
A cross-site scripting vulnerability in Jenkins Warnings NG Plugin 5.0.0 and earlier allowed attacker with Job/Configure permission to inject arbitrary JavaScript in build overview pages. (2019-05-31, CVE-2019-10325)
A cross-site scripting vulnerability exists in Jenkins Warnings Next Generation Plugin 1.0.1 and earlier in src/main/java/io/jenkins/plugins/analysis/core/model/DetailsTableModel.java, src/main/java/io/jenkins/plugins/analysis/core/model/SourceDetail.java, src/main/java/io/jenkins/plugins/analysis/core/model/SourcePrinter.java, src/main/java/io/jenkins/plugins/analysis/core/util/Sanitizer.java, src/main/java/io/jenkins/plugins/analysis/warnings/DuplicateCodeScanner.java that allows attackers with the ability to control warnings parser input to have Jenkins render arbitrary HTML. (2019-02-06, CVE-2019-1003023)
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>