Comprehensive Explanation from CEH v13 Courseware:

CEH v13 identifies XML Signature Wrapping (XSW) attacks, also known simply as Wrapping attacks, as a major threat against SOAP-based web services. These attacks exploit weak XML parsing and insufficient validation of signed message components. SOAP messages often include digitally signed sections, but if the server validates the signature without confirming the correct position or structure of the signed elements, attackers can duplicate, move, or wrap signed content inside a modified XML envelope. This allows an attacker to inject malicious payloads while still presenting a valid signature. CEH details how this can lead to unauthorized execution, privilege escalation, or bypassing authentication controls in SOAP APIs. Cloud snooping, cryptanalysis, and IMDS abuse do not involve message duplication or signature misplacement. The scenario precisely matches CEH’s definition of a Wrapping Attack in SOAP/XML security.