Unsafe Reflection

Overview craftcms/cms is a content management system. Affected versions of this package are vulnerable to Unsafe Reflection via the set and get methods in the Behavior class. An administrator can execute arbitrary code on the server by submitting a JSON payload that attaches a maliciousBehavior...

GHSA-255J-QW47-WJH5 Craft CMS vulnerable to potential authenticated Remote Code Execution via malicious attached Behavior

Note that attackers must have administrator access to the Craft Control Panel for this to work. Users should update to the patched versions 5.8.21 and 4.16.17 to mitigate the issue. Resources: https://github.com/craftcms/cms/commit/6e608a1a5bfb36943f94f584b7548ca542a86fef...