Multiple cross-site scripting (XSS) vulnerabilities in XWiki Watch 1.0 allow remote attackers to inject arbitrary web script or HTML via the rev parameter to (1) bin/viewrev/Main/WebHome and (2) bin/view/Blog, and the (3) register_first_name and (4) register_last_name parameters to bin/register/XWiki/Register. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.
Multiple cross-site scripting (XSS) vulnerabilities exist in XWiki Watch 1.0, allowing attackers to inject malicious scripts into web pages. Successful exploitation could lead to account compromise, data theft, or website defacement, impacting user trust and potentially leading to further attacks.
Step 1: Payload Delivery: The attacker crafts a malicious URL containing a JavaScript payload within the vulnerable parameters (rev, register_first_name, or register_last_name).
Step 2: User Interaction: The attacker tricks a user into clicking the malicious URL, typically through phishing, social engineering, or other means.
Step 3: Server Processing: The XWiki server receives the request and processes the URL, including the attacker-supplied parameters.
Step 4: Vulnerable Code Execution: The server's code, failing to sanitize the input, directly incorporates the attacker's JavaScript payload into the HTML response.
Step 5: Browser Rendering: The victim's browser receives the HTML response, including the malicious JavaScript.
Step 6: Payload Execution: The browser executes the attacker's JavaScript payload within the context of the XWiki website, allowing the attacker to perform actions on behalf of the victim.
The root cause of these XSS vulnerabilities lies in the lack of proper input validation and output encoding for user-supplied data. Specifically, the rev, register_first_name, and register_last_name parameters are not sanitized before being displayed on the web pages. This allows attackers to inject arbitrary HTML and JavaScript code. The vulnerable code likely directly incorporates these parameters into the HTML response without escaping special characters like <, >, ", and '. This failure to sanitize user input allows the attacker's malicious script to execute within the context of the victim's browser, enabling a variety of attacks, including session hijacking, phishing, and redirection to malicious websites. The absence of Content Security Policy (CSP) further exacerbates the risk.