File upload functionality
Summary: PortSwigger Research notes that file upload functionality is commonly associated with a number of vulnerabilities and is not straightforward to implement securely. It advises reviewing upload features to understand their purpose and whether uploaded content is ever returned to other application users, either through normal usage or by an attacker feeding a specific link.
Bottom line: The risk hinges on whether uploaded content is ever served back to other users - if it is, an attacker-supplied file can reach people who never chose to open it.
Read the original at PortSwigger Research ↗
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