CVE-2026-116897 REDAXO before 5.21.4 Missing Authorization in Version and History Previews

REDAXO core before 5.21.4 contains a missing authorization vulnerability in the structure/version and structure/history frontend preview modes, which do not check category or clang permissions for the previewed article. Any backend user, or one holding historyarticlerollback, can set rexversion o...