JBoss AS 7 prior to 7.1.1 and mod_cluster do not handle default hostname in the same way, which can cause the excluded-contexts list to be mismatched and the root context to be exposed.
https://github.com/advisories/GHSA-wq8g-hm94-5rqq
https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-1860