Zero-Day Advisory

Fortinet Discovers WordPress Quiz And Survey Master Plugin Cross-Site Scripting Vulnerability

Summary

Fortinet's FortiGuard Labs has discovered a cross-site scripting (XSS) vulnerability in WordPress Quiz And Survey Master Plugin.


Wordpress Quiz plugin - Quiz and Survey Master is a popular plugin with over 30,000+ active installations. This plugin offers several customization and premium addons.


A stored cross-site scripting vulnerability exists in Quiz and Survey Master plugin (version 6.4.12 & below). The vulnerability exists in quiz creation module where a user with low privileges is allowed to execute arbitrary script code within the context of the application. This vulnerability is due to insufficient validation of text editor and correct answers parameter.

Solutions

FortiGuard Labs released the following FortiGate IPS signature which covers this specific vulnerability:

WordPress.Quiz.And.Survey.Master.Plugin.XSS
Released Jul 23, 2020

Update to the newest version 7.0.0.

Timeline

Fortinet reported the vulnerability to QSM Team on July 13, 2020 

QSM Team confirmed the vulnerability on July 22, 2020 

QSM Team fixed the vulnerability on July 22, 2020

References

Acknowledgement

This vulnerability was discovered by Vishnupriya Ilango of Fortinet's FortiGuard Labs.

IPS Subscription

Fortinet customers who subscribe to Fortinet's intrusion prevention (IPS) service should be protected against this vulnerability with the appropriate configuration parameters in place. Fortinet's IPS service is one component of FortiGuard Subscription Services, which also offer comprehensive solutions such as antivirus, Web content filtering and antispam capabilities. These services enable protection against threats on both application and network layers. FortiGuard Services are continuously updated by FortiGuard Labs, which enables Fortinet to deliver a combination of multi-layered security intelligence and true zero-day protection from new and emerging threats. These updates are delivered to all FortiGate, FortiMail and FortiClient products. Fortinet strictly follows responsible disclosure guidelines to ensure optimum protection during a threat's lifecycle.