Overview
Cross-Site Scripting (XSS) vulnerabilities have long been a thorn in the side of web security, posing a threat to both users and the companies that serve them. The recently identified vulnerability, CVE-2023-48730, is no exception. This high-severity issue resides in the user name functionality of the navbarMenuAndLogo.php module of the WWBN AVideo web application. It has the potential to compromise system integrity or lead to data leakage, making it a significant area of concern for users and administrators of this software.
Vulnerability Summary
CVE ID: CVE-2023-48730
Severity: High (8.5 CVSS)
Attack Vector: Network
Privileges Required: None
User Interaction: Required
Impact: System compromise or data leakage
Affected Products
No phone number, email, or personal info required.
Product | Affected Versions
WWBN AVideo | dev master commit 15fed957fb
How the Exploit Works
The vulnerability lies in the user name functionality of the navbarMenuAndLogo.php module. By crafting a specially tailored HTTP request, an attacker can execute arbitrary JavaScript code. This is possible due to insufficient sanitization of user input, allowing malicious scripts to be injected and subsequently executed in the user’s browser.
Conceptual Example Code
Below is a hypothetical example of how this vulnerability might be exploited. This is a simple HTTP GET request, where the attacker manipulates the “username” query parameter with malicious JavaScript code:
GET /navbarMenuAndLogo.php?username=<script>/* malicious JavaScript code */</script> HTTP/1.1
Host: vulnerable.example.comIn this example, the malicious script within the “username” parameter would be executed in the context of the user’s browser, potentially leading to a variety of impacts, including theft of sensitive user data or even full compromise of the user’s account.
The best way to mitigate this vulnerability is by applying the vendor-provided patch. If the patch cannot be applied immediately, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. These tools can be configured to block or alert on suspicious activity, such as attempts to exploit this vulnerability. However, these are just stopgap measures; applying the vendor’s patch is the only way to fully resolve this vulnerability.