GHSA-v4m9-jvvr-83cx: REDAXO before 5.21.4 Missing Authorization in Version and History Previews
Published Oct 27, 2026
·Updated
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or one holding history[articlerollback], can set rexversion or rexhistorydate with arbitrary articleid values to read unpublished working versions and historic or deleted content.
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
REDAXO coreto a version that resolves this vulnerability.Fixed in 5.21.4
Event History
Oct 27, 2026
CVE Published
via OSV·10:59 AM
Data Sourced
via OSV·10:59 AM
DescriptionSeverityWeakness