Multiple cross-site scripting (XSS) vulnerabilities in IPortalX before Build 033 allow remote attackers to inject arbitrary web script or HTML via the (1) KW and (2) SF parameters to forum/login_user.asp, and (3) the Date parameter to blogs.asp.
Multiple cross-site scripting (XSS) vulnerabilities exist in IPortalX versions prior to Build 033, allowing attackers to inject malicious scripts into web pages. This could lead to account compromise, data theft, and website defacement. Successful exploitation requires no authentication and can be achieved remotely.
Step 1: Payload Delivery: The attacker crafts a malicious URL containing a specially crafted XSS payload within the vulnerable parameters (KW, SF, or Date).
Step 2: User Interaction: The attacker lures a victim to click the malicious URL, typically through phishing, social engineering, or other means.
Step 3: Server Processing: The IPortalX application receives the request containing the malicious payload.
Step 4: Insufficient Sanitization: The application processes the request, but fails to properly sanitize or encode the attacker-supplied input.
Step 5: Payload Rendering: The application renders the vulnerable page, including the attacker's injected script, within the victim's browser.
Step 6: Script Execution: The victim's browser executes the injected JavaScript, allowing the attacker to perform actions such as stealing cookies, redirecting the user, or defacing the website.
The vulnerability stems from insufficient input validation and output encoding within the IPortalX application. Specifically, the application fails to properly sanitize user-supplied data passed through the KW, SF parameters in forum/login_user.asp, and the Date parameter in blogs.asp. This allows attackers to inject arbitrary HTML or JavaScript code. When these parameters are rendered on the webpage without proper escaping, the injected script executes in the context of the victim's browser, enabling various attacks like session hijacking, cookie theft, and redirection to malicious websites. The root cause is a lack of input validation and output encoding (e.g., HTML entity encoding) for user-supplied data before it's displayed in the web application's response. This allows the attacker to control the content displayed to other users.