---
id: CVE-2026-63000
title: REDAXO is a PHP-based content management system
summary: >-
  REDAXO is a PHP-based content management system. Prior to 5.21.2,
  rex_api_install_package_update in
  redaxo/src/addons/install/lib/api/api_package_update.php inherits the false
  default from rex_api_function::requiresCsrfProtection() inste…
severity: medium
cvss: 6.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L'
cwe:
  - CWE-352
vendor: redaxo
product: core
affected:
  - core < 5.21.2
patched:
  - redaxo/source 5.21.2
published: '2026-09-23'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T18:12:04.247'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-63000'
references:
  - url: >-
      https://github.com/redaxo/core/commit/a13abbffbad4fdea46a4edc86cdba3335ca9e8f3
    label: security-advisories@github.com
  - url: 'https://github.com/redaxo/core/pull/6579'
    label: security-advisories@github.com
  - url: 'https://github.com/redaxo/core/releases/tag/5.21.2'
    label: security-advisories@github.com
  - url: 'https://github.com/redaxo/core/security/advisories/GHSA-m8r3-22v6-g877'
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-m8r3-22v6-g877'
tags:
  - nvd
  - cve.org
  - ghsa
  - composer
aliases:
  - GHSA-m8r3-22v6-g877
ecosystem: composer
ingestedAt: '2026-09-23T14:25:29.804Z'
epss: 0.00131
epssPercentile: 0.02192
---

## Overview

REDAXO is a PHP-based content management system. Prior to 5.21.2, rex_api_install_package_update in redaxo/src/addons/install/lib/api/api_package_update.php inherits the false default from rex_api_function::requiresCsrfProtection() instead of requiring a CSRF token. An unauthenticated attacker can cause a logged-in administrator's browser to request a selected package update from the configured REDAXO package server, changing installed addon code or disrupting the site without the administrator's intent. This issue is fixed in version 5.21.2.

## Remediation

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

## Package advisory (CVE-2026-63000)

Affected packages:

- `redaxo/source <= 5.21.1`

Patched in:

- `redaxo/source 5.21.2`

Source: https://github.com/advisories/GHSA-m8r3-22v6-g877