Security Vulnerabilities in EU's Standardized Electronic Invoice System
By
todsacerdoti
Fresh out the oven, still warm. Top of the tray.
Summary
The article discusses security vulnerabilities in the EU's standardized electronic invoice system (eInvoicing Directive 2014/55/EU), which mandates XML-based invoices across member states. While machine-readable invoices are beneficial, the EU's implementation suffers from needless complexity, lack of true standardization with multiple syntaxes and sub-formats, and significant security issues including XML External Entity (XXE) attacks and other vulnerabilities. The content appears to be supplementary material from a presentation at the German OWASP Day 2025, highlighting security concerns with the mandated electronic invoice system.
Key quotes
· 3 pulledWith the eInvoicing Directive (2014/55/EU), the European Union introduced 'standardized' electronic invoices in XML format.
While machine-readable invoices are, in general, a good idea, there are various issues with the EU's approach, including needless complexity, a lack of true standardization (multiple syntaxes and various sub-formats).
This page provides supplementary material for a presentation given at the German OWASP Day 2025.
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