Configuration Management / Html5 Web Message Manipulation
HTML5 Web Message Manipulation (CWE-734) is a type of vulnerability in which an attacker intercepts and manipulates web messages sent between a client and a server. This vulnerability occurs in web and API services, allowing an attacker to alter web messages sent over HTTP or HTTPS, redirecting users to malicious websites, tampering with data being sent to the server, or even sending counterfeit messages to the server. As defined by the OWASP Testing Guide, this vulnerability can occur when messages are not properly encrypted or authenticated, or when the application fails to validate the origin of messages.
HTML5 Web Message Manipulation can result in a variety of attacks, including cross-site scripting, cross-site request forgery, man-in-the-middle attacks, and other malicious activities. These attacks can lead to compromised credentials, data leakage, and account takeover. According to the CVE directory, these vulnerabilities can have a high severity rating, depending on the implementation and the type of data being manipulated.
The best way to mitigate the risk of HTML5 Web Message Manipulation is to use secure transmission protocols, such as TLS or SSL, and to authenticate messages using digital signatures. It is also recommended to validate the origin of incoming messages and to update web applications regularly.
The following example code is taken from the CVE directory:
The above code shows a vulnerable implementation of HTML5 Web Message Manipulation. It fails to validate the origin of the incoming message, making it easy for an attacker to manipulate and redirect the user to a malicious website.