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Logical backend code:
This question involves flash xss knowledge points
flash xss
Flash XSS (Cross-Site Scripting) refers to cross-site scripting attacks against applications developed using Adobe Flash technology.
Flash is a widely used technology for creating rich media and interactive content. Malicious Flash files are embedded into trusted web pages. When a user visits a page containing a malicious Flash file, the Flash file will be displayed in the user's browser. implement.
Due to the browser's flash problem, this question will not be described in detail.
POC：
arg01=version&arg02=<a href="javascript:alert(1)">xss</a>
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