CVE-2026-63000 REDAXO: Missing CSRF Protection on Package Update Action Allows Forced Addon Updates
An unauthenticated attacker can force a logged-in administrator to update addons via CSRF, potentially altering site code or disrupting operations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-63000?
CVE-2026-63000 is a medium-severity vulnerability in redaxo core, published on 23 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
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.
Weakness: CWE-352
Which versions are affected by CVE-2026-63000?
2 open source packages ship an affected version, including redaxo/source. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
redaxo/source Packagist | All versions | 5.21.2 |
redaxo/source Packagist | All versions | 5.21.2 |
Products include Redaxo Redaxo.
How do I fix CVE-2026-63000?
Upgrade redaxo/source to 5.21.2 or later.
Is CVE-2026-63000 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-63000 exists.
Other vulnerabilities in redaxo core
- CVE-2018-18200 SQL injection in n/a
- CVE-2018-17831 SQL injection in n/a
- CVE-2026-21857 Redaxo has Path Traversal in Backup Addon Leading to Arbitrary File Read
- CVE-2006-2843 Code injection in n/a
- CVE-2006-2844 Multiple PHP remote file inclusion vulnerabilities in Redaxo 3.0 allow remote attackers to execute arbitrary PHP code via a URL in the REX[I
Sources
Also known as GHSA-m8r3-22v6-g877.