vBulletin 5.0.0 through 5.5.4 is susceptible to a remote command execution vulnerability via the widgetConfig parameter in an ajax/render/widget_php routestring request. An attacker can execute malware, obtain sensitive information, modify data, and/or gain full control over a compromised system without entering necessary credentials.
View the template here CVE-2019-16759.yaml
References:
https://seclists.org/fulldisclosure/2019/Sep/31