Description: File upload vulnerability is a security flaw that allows an attacker to upload malicious files to a server. This vulnerability occurs when a web application does not properly validate the files being uploaded, which can lead to the execution of malicious code, data theft, or system compromise. Key characteristics of this vulnerability include a lack of restrictions on the type of file that can be uploaded, absence of security measures such as content verification of the file, and lack of adequate access controls. The relevance of this vulnerability lies in its ability to allow attackers to execute scripts or programs on the server, potentially causing significant damage to both infrastructure and sensitive information. Exploiting this vulnerability can lead to web shell attacks, where the attacker gains remote access to the server, or malware injection that can spread to other connected systems. Therefore, it is crucial for organizations to implement robust security measures, such as file validation, limiting allowed file types, and enforcing strict access controls to mitigate this risk.
