Remote Code Execution vulnerability in symphony/content/content.blueprintsdatasources.php in Symphony CMS through 2.6.11 allows remote attackers to execute code and get a webshell from the back-end. The attacker must be authenticated and enter PHP code in the datasource editor or event editor.
https://github.com/symphonycms/symphony-2/issues/2655
https://github.com/symphonycms/symphony-2/commit/e30a18f8f09dca836e141bf126a26e565c9a2bc7