---
id: CVE-2026-116897
title: REDAXO before 5.21.4 Missing Authorization in Version and History Previews
summary: >-
  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,…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-862
vendor: redaxo
product: core
affected:
  - core < 5.21.4
published: '2026-10-27'
updated: '2026-10-27'
sourceUpdated: '2026-10-27T10:59:26.165Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116897'
references:
  - url: 'https://github.com/redaxo/core/security/advisories/GHSA-v4m9-jvvr-83cx'
    label: GitHub Security Advisory (GHSA-v4m9-jvvr-83cx)
  - url: >-
      https://www.vulncheck.com/advisories/redaxo-before-5.21.4-missing-authorization-in-version-and-history-previews
    label: >-
      VulnCheck Advisory: REDAXO before 5.21.4 Missing Authorization in Version
      and History Previews
tags:
  - cve.org
ingestedAt: '2026-10-27T16:11:59.292Z'
---

## Overview

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one holding history[article_rollback], can set rex_version or rex_history_date with arbitrary article_id values to read unpublished working versions and historic or deleted content.

## Affected

- `core < 5.21.4`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.