: Specifies the target file to be read. In this instance, it targets the AWS credentials file, which typically contains highly sensitive aws_access_key_id aws_secret_access_key Stack Overflow Conversion Filters - Manual - PHP
: A PHP wrapper that allows the application of filters to a stream before the data is read or written. read=convert.base64-encode : Instructs PHP to encode the target file's content into . This is a common bypass technique because: : Specifies the target file to be read
This payload is designed to be injected into a vulnerable URL parameter (e.g., sushant747.gitbooks.io php://filter it targets the AWS credentials file
echo "W2RlZmF1bHRd..." | base64 -d
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