Document Title: =============== Vanguard v2.1 - (Search) POST Inject Web Vulnerability References (Source): ==================== Release Date: ============= 2021-10-26 Vulnerability Laboratory ID (VL-ID): ==================================== 2283 Common Vulnerability Scoring System: ==================================== 4 Vulnerability Class: ==================== Cross Site Scripting - Non Persistent Current Estimated Price: ======================== 500€ - 1.000€ Product & Service Introduction: =============================== Abstract Advisory Information: ============================== The vulnerability laboratory core research team discovered a post inject web vulnerability in the Vanguard v2.1 cms web-application. Affected Product(s): ==================== VanguardInfini Product: Vanguard v2.1 - CMS (PHP) (Web-Application) Vulnerability Disclosure Timeline: ================================== 2021-10-26: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Exploitation Technique: ======================= Remote Severity Level: =============== Medium Authentication Type: ==================== Pre Auth (No Privileges or Session) User Interaction: ================= Low User Interaction Disclosure Type: ================ Responsible Disclosure Technical Details & Description: ================================ A non-persistent post inject web vulnerability has been discovered in the official Vanguard v2.1 cms web-application. The vulnerability allows remote attackers to inject malicious script code in post method requests to compromise user session data or to manipulate application contents for clients. The vulnerability is located in the phps_query parameter of the search module. The vulnerability is a classic post injection web vulnerability with non-persistent attack vector. Successful exploitation of the vulnerability results in session hijacking, non-persistent phishing attacks, non-persistent external redirects to malicious source and non-persistent manipulation of affected application modules. Request method(s): [+] POST Vulnerable Input(s): [+] Search Vulnerable Parameter(s): [+] phps_query Proof of Concept (PoC): ======================= The client-side post inject web vulnerability can be exploited by remote attackers without account and with low or medium user interaction. For security demonstration or to reproduce the cross site web vulnerability follow the provided information and steps below to continue. Vulnerable Source: search