What is the potential security risk of using an iframe to download files from a server in PHP?

Using an iframe to download files from a server in PHP can pose a security risk known as Clickjacking, where an attacker can trick a user into unknowingly clicking on a malicious link disguised as a legitimate file download. To mitigate this risk, you can set the X-Frame-Options header to deny or sameorigin to prevent the iframe from loading the file download page in a frame. 

header('X-Frame-Options: DENY');
// Or
header('X-Frame-Options: SAMEORIGIN');

Keywords

iframe security risk file download server PHP

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