*1. Introduction* Affected Product: Fiyo CMS 2.0.2.1 Fixed in: Fiyo CMS 2.0.6 Fixed Version Link: http://www.fiyo.org/blog/versi-2-0-6-banyak-perubahan-untuk-stabilitas Vendor Website: http://www.fiyo.org/ Vulnerability Type: Persistent XSS Remote Exploitable: Yes Reported to vendor: 28/12/2015 Fixed by Vendor: 15/01/2016 CVE: *2. Overview* There are multiple persistent XSS vulnerabilities in Fiyo CMS 2.0.2.1. The vulnerabilities exist due to insufficient filtration of user-supplied data. A remote attacker can execute arbitrary HTML and script code in browser in context of the vulnerable application. *3. Affected Modules* Affected fields in the modules are listed below: i. Users User Group -> Group Name, Description ii. Modules Module Details->Judul Modul, Posisi iii. Menus Main Menu-> Menu Details->Nama Footer Menu-> Menu Details->Nama Categories->Menu Details->Judul Kategori Admin Panel-> Menu Details->Nama Attached POC. *4. Payload* <script>alert('XSS')</script> *5. Credit* Himanshu Mehta *6. Tested By* Himanshu Mehta and Sachin Wagh mehta.himanshu21@gmail.com wsachin092@gmail.com