CVE-2025-40697 in WebMeasure
Summary
by MITRE • 02/19/2026
Reflected Cross-Site Scripting (XSS) vulnerability in '/index.php' in Lewe WebMeasure, which allows remote attackers to execute arbitrary code through the 'page' parameter. This vulnerability can be exploited to steal sensitive user data, such as session cookies, or to perform actions on behalf of the user.
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Analysis
by VulDB Data Team • 02/19/2026
This reflected cross-site scripting vulnerability exists in the Lewe WebMeasure application's index.php file where the 'page' parameter is not properly validated or sanitized before being returned to users. The flaw allows remote attackers to inject malicious scripts that execute in the context of a victim's browser when they click on a specially crafted link. This type of vulnerability falls under CWE-79 which specifically addresses improper neutralization of input during web page generation, making it a classic example of how insufficient input validation can lead to severe security consequences. The vulnerability operates by taking user-supplied input from the page parameter and directly incorporating it into the web response without adequate sanitization or encoding mechanisms.
The operational impact of this vulnerability is significant as it enables attackers to perform a wide range of malicious activities through the victim's browser session. An attacker could craft a payload that steals session cookies, allowing them to hijack user sessions and impersonate legitimate users within the application. Additionally, the vulnerability could be exploited to perform unauthorized actions on behalf of users, potentially leading to data theft, account takeovers, or modification of sensitive information. The reflected nature of this vulnerability means that the malicious script is reflected back to the user through the web application's response, making it particularly dangerous as it can be delivered via email links, chat messages, or any other means that directs users to the vulnerable endpoint. This attack vector aligns with ATT&CK technique T1566 which describes social engineering tactics used to deliver malware or exploit code.
The exploitation process typically involves crafting a malicious URL containing script code within the page parameter, which when visited by a victim, executes in their browser context. The vulnerability is particularly concerning because it affects the main application entry point, meaning that any user accessing the application through a compromised link could be targeted. The reflected nature means that the attack payload is not stored on the server, but rather injected into the response at runtime, making it difficult to detect through traditional server-side scanning methods. This vulnerability directly impacts the application's integrity and confidentiality, as it allows unauthorized access to user sessions and potentially sensitive data. The risk is exacerbated by the fact that such vulnerabilities are often discovered through automated scanning tools and can be quickly weaponized by threat actors, making them a high-priority target for immediate remediation.
Mitigation strategies should focus on implementing proper input validation and output encoding mechanisms throughout the application. The most effective approach involves sanitizing all user inputs before they are processed or returned in web responses, using techniques such as HTML entity encoding for output contexts. Implementing a Content Security Policy (CSP) can provide additional protection by restricting the sources from which scripts can be executed, while also preventing the execution of unauthorized code. The application should also implement proper parameter validation to ensure that only expected values are accepted for the page parameter, potentially using allowlists of valid page names or implementing strict input filtering. Regular security testing including dynamic application security testing (DAST) and manual penetration testing should be conducted to identify similar vulnerabilities across the application. Additionally, implementing proper logging and monitoring can help detect exploitation attempts, while security headers such as X-Content-Type-Options and X-Frame-Options should be configured to provide additional defense-in-depth measures against various attack vectors.