What’s Vulnerable › Vulnerabilities

CVE-2026-63000: REDAXO: Missing CSRF Protection on Package Update Action Allows Forced Addon Updates

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-09-23 · updated 2026-10-19
• Weakness: CWE-352

Description

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.

Affected products

• redaxo: before 5.21.2 — fixed in 5.21.2

How to fix

Upgrade to a fixed version: redaxo 5.21.2. Check the vendor advisory for mitigations.

References

• https://github.com/redaxo/core/commit/a13abbffbad4fdea46a4edc86cdba3335ca9e8f3
• https://github.com/redaxo/core/pull/6579
• https://github.com/redaxo/core/releases/tag/5.21.2
• https://github.com/redaxo/core/security/advisories/GHSA-m8r3-22v6-g877
• https://github.com/redaxo/core/security/advisories/GHSA-m8r3-22v6-g877

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