The Apache DeltaSpike-JSF 1.8.0 module has a XSS injection leak in the windowId handling. The default size of the windowId get's cut off after 10 characters (by default), so the impact might be limited. A fix got applied and released in Apache deltaspike-1.8.1.
https://git-wip-us.apache.org/repos/asf?p=deltaspike.git%3Bh=4e25023