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Multiple Cross-Site Scripting (XSS) in XWork generated error pages
Who should read this
All Struts 2 developers
Impact of vulnerability
Injection of malicious client side code
Maximum security rating
Developers should either upgrade to Struts 2.2.3 or apply the configuration changes described below
Struts 2.0.0 - Struts 220.127.116.11
Original JIRA Tickets
Dr. Marian Ventuneac, Genworth
By default, XWork doesn't escape action's names in automatically generated error page, allowing for a successful XSS attack. When Dynamic Method Invocation (DMI) is enabled, the action name is generated dynamically base on request parameters. This allows to call non-existing page and method to produce error page with injected code as below
A more detailed description is found in the referenced JIRA ticket.
As of Struts 2.2.3 the action names are escaped when automatically generated error pages are rendered.
When staying with earlier releases, developers should either
You can obtain Struts 2.2.3 here.