LimeSurvey 2.6.x before 2.6.7, 2.7x.x before 2.73.1, and 3.x before 3.4.2 mishandles application/controller/InstallerController.php after installation, which allows remote attackers to access the configuration file.
LimeSurvey version 3.0.0-beta.3+17110 contains a Cross ite Request Forgery (CSRF) vulnerability in Theme Uninstallation that can result in CSRF causing LimeSurvey admins to delete all their themes, rendering the website unusable. This attack appear to be exploitable via Simple HTML markup can be used to send a GET request to the affected endpoint.
SQL injection vulnerability in Limesurvey (a.k.a PHPSurveyor) before 1.91+ Build 120224 and earlier allows remote attackers to execute arbitrary SQL commands via the fieldnames parameter to index.php.