Requests that execute transactions must not follow any distinguishable pattern.
CAPEC-21: Exploitation of Trusted Identifiers: An adversary guesses, obtains, or "rides" a trusted identifier (e.g., session ID, resource ID, cookie, etc.) to perform authorized actions under the guise of an authenticated user or service. Attacks on trusted identifiers take advantage of the fact that some software accepts user input without verifying its authenticity.
CAPEC-31: Accessing/Intercepting/Modifying HTTP Cookies: This attack relies on the use of HTTP Cookies to store credentials, state information and other critical data on client systems. There are several different forms of this attack. The first form of this attack involves accessing HTTP Cookies to mine for potentially sensitive data contained therein. The second form involves intercepting this data as it is transmitted from client to server.
CWE-352: Cross-Site Request Forgery (CSRF): The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.
OWASP-ASVS v4.0.1 V4.2 Operation Level Access Control.(4.2.2): Verify that the application or framework enforces a strong anti-CSRF mechanism to protect authenticated functionality, and effective anti-automation or anti-CSRF protects unauthenticated functionality.
PCI DSS v3.2.1 - Requirement 6.5.9: Address common coding vulnerabilities in software-development processes such as cross-site request forgery (CSRF).