Apache Axis2 allows remote attackers to forge messages and bypass authentication via a SAML assertion that lacks a Signature element, aka a "Signature exclusion attack," a different vulnerability than CVE-2012-4418.
https://github.com/advisories/GHSA-66rx-gqx3-p98m
https://www.oracle.com/security-alerts/cpuapr2022.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/79487
https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-2731
http://www.nds.rub.de/media/nds/veroeffentlichungen/2012/08/22/BreakingSAML_3.pdf