Answer:
Information Disclosure
Step-by-step explanation:
Hello, the fact that the attacker was able to gather information from within the embedded HTML code suggests that the original developer did not properly store information, revealing potential issues or vulnerabilities in his/her design.
The STRIDE model stands for Spoofing, Tampering, Repudiation, Information Disclosure, Denial of Service, and Elevation of Privilege.
Using the STRIDE model, one would say this would be a simple information disclosure attack, since the attacker used retrieved information to breach the system.
Cheer.