CSRF in Redaxo Core
CVE-2026-63000
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.
Vulnerability class: CSRF (Cross-Site Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L.
EPSS exploit prediction
EPSS: 0.001 (4.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000
Affected products
- Redaxo Core — versions < 5.21.2
- Redaxo
Weakness classification (CWE)
References
- github.com/redaxo/core/security/advisories/GHSA-m8r3-22v6-g877 (Exploit, Vendor Advisory)
- github.com/redaxo/core/pull/6579 (Patch, Issue Tracking)
- github.com/redaxo/core/commit/a13abbffbad4fdea46a4edc86cdba3335ca9e8f3 (Patch)
- github.com/redaxo/core/releases/tag/5.21.2 (Release Notes)
Frequently asked questions
- What is CVE-2026-63000?
- CVE-2026-63000 is a medium-severity vulnerability in Redaxo Core, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.4/10. Published 2026-09-23.
- How severe is CVE-2026-63000?
- Medium severity. CVSS v3 base score is 6.4 out of 10.