REDAXO: Missing CSRF Protection on Package Update Action Allows Forced Addon Updates

[ Why it matters ]Priority signals

• Public proof-of-concept exploit exists (CISA SSVC)

[ Description ]Official 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.

[ Fixes ]Fixes and patches

• redaxo/source 5.21.2Fixed version · GitHub Advisories · composer package redaxo/source: upgrade to 5.21.2 or later (affected <= 5.21.1)
• Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
• Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ Packages ]Affected open-source packages

• redaxo/source composerAffected <= 5.21.1 · fixed in 5.21.2 · GHSA-m8r3-22v6-g877

[ References ]References

• github.com/redaxo/core/commit/a13abbffbad4fdea46a4edc86cdba3335ca9e8f3Patch
• github.com/redaxo/core/pull/6579Issue TrackingPatch
• github.com/redaxo/core/releases/tag/5.21.2Release Notes
• github.com/redaxo/core/security/advisories/GHSA-m8r3-22v6-g877ExploitVendor Advisory