Incorrect Access Control

Technical Description

A Cross-Site Scripting (XSS) vulnerability (CWE-79) was identified in Zucchetti Helpdesk Advanced (HDA) 11.2. The application backend fails to properly sanitize and contextually encode user-supplied input supplied via the __title parameter before rendering it into the response DOM. An attacker can craft a malicious URL containing a URL-encoded JavaScript payload that executes arbitrarily within the victim's browser session upon accessing the link. Impact:

Impact

Successful exploitation allows an attacker to execute arbitrary client-side code in the context of an authenticated user's session, leading to:

• Session Hijacking: Exfiltration of session tokens, sensitive cookie data, or authentication parameters stored in the browser.
• Unauthorized Actions / Client Impersonation: Execution of API requests and platform actions on behalf of the victim (with severity escalating if the victim possesses administrative privileges).
• Phishing & DOM Tampering: Dynamic manipulation of the rendered interface to harvest credentials or redirect users to malicious external domains.

Remediation

Upgrade to the latest software release provided by the vendor to ensure appropriate output encoding and input sanitization routines are enforced on all HTTP parameters.