-template-..-2f..-2f..-2f..-2froot-2f.aws-2fcredentials

The operating system resolves the relative path, steps completely out of /var/www/html/templates/ , and prints the contents of the AWS credentials file directly to the attacker’s web browser. Remediation and Mitigation Strategies

To understand how this attack functions, the payload must be broken down into its component parts:

Let's break it down. The -2F sequences are URL encoding for the forward slash character ( / ). When decoded, the string becomes: -template-..-2F..-2F..-2F..-2Froot-2F.aws-2Fcredentials

: AWS provides configuration and credential files for storing settings and credentials. Keep these files updated and secure.

Automated scanners (like Nuclei, Nikto, or custom bots) constantly probe for path traversal vulnerabilities. They try common payloads: The operating system resolves the relative path, steps

The template parameter directly passed to fs.readFileSync() without sanitization. Developer used path.join(__dirname, 'templates', req.query.template) but failed to resolve absolute path.

If an attacker successfully retrieves the .aws/credentials file, the consequences are often catastrophic: When decoded, the string becomes: : AWS provides

: Compromised credentials can result in unexpected charges on your AWS account as attackers use your resources for malicious activities.