Cross-site scripting (XSS) vulnerability in XWiki Enterprise before 2.5 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
XWiki Enterprise versions prior to 2.5 are vulnerable to a critical cross-site scripting (XSS) attack, allowing attackers to inject malicious JavaScript into web pages viewed by other users. This vulnerability could lead to account compromise, data theft, and complete control of the affected web application if successfully exploited.
Step 1: Payload Delivery: The attacker crafts a malicious payload (JavaScript code) designed to exploit the XSS vulnerability.
Step 2: Payload Injection: The attacker injects the payload into the XWiki application. This could be achieved through various means, such as submitting the payload via a form, including it in a URL parameter, or embedding it in a wiki page.
Step 3: Data Storage: The injected payload is stored within the XWiki application's database or other storage mechanisms.
Step 4: User Interaction: A legitimate user accesses a page or resource within XWiki that displays the attacker's injected payload.
Step 5: Payload Execution: The user's browser executes the malicious JavaScript payload within the context of the XWiki domain. This allows the attacker to perform actions on behalf of the user, such as stealing cookies, redirecting the user to a phishing site, or modifying the content of the page.
The vulnerability stems from insufficient input validation and output encoding within XWiki Enterprise. Specifically, the application fails to properly sanitize user-supplied data before rendering it in the browser. This allows attackers to inject malicious JavaScript code into input fields or other areas where user-provided content is displayed. The lack of proper input sanitization and output encoding (e.g., HTML escaping) allows the injected script to execute within the context of the vulnerable website, leading to XSS.