Concrete CMS (previously concrete5) before 9.1 is vulnerable to stored XSS in RSS Displayer via the href attribute because the link element input was not sanitized.Referenceshttps://github.com/concretecms/concretecms/releaseshttps://www.concretecms.org/about/project-news/security/concrete-cms-security-advisory-2023-04-20
