Provide references for CVE-2019-15640.
Where can I find more information about CVE-2019-15640?
References are available at: https://github.com/LimeSurvey/LimeSurvey/commit/0479e3ff93ff1473a25c71e83cc011920b072b4c#diff-d539f3f8185667ee48db78e1bf65a3b4R43.