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peppol-py

Peppol-py before 1.1.1 allows XXE attacks because of the Saxon configuration. When validating XML-based invoices, the XML parser could read files from the filesystem and expose their content to a remote host.

CVE-2025-66371 is an XML External Entity (XXE) vulnerability classified under CWE-611, affecting Iteras Peppol-py versions prior to 1.1.1. Peppol-py is a Python library used for handling Peppol e-invoicing documents, which are XML-based. The vulnerability stems from the Saxon XML parser's configuration that does not properly restrict external entity references. When Peppol-py validates XML invoices, a specially crafted XML input can exploit this misconfiguration to cause the parser to access and read arbitrary files on the host filesystem. The contents of these files can then be exfiltrated to a remote attacker, compromising confidentiality. The CVSS v3.1 base score is 5.0 (medium severity), reflecting network attack vector, low attack complexity, required privileges (low), no user interaction, and partial confidentiality impact without affecting integrity or availability. The vulnerability scope is changed (S:C) because the attack can affect resources beyond the vulnerable component. There are no known public exploits or patches at the time of publication, but the recommended fix is to upgrade Peppol-py to version 1.1.1 or later, which presumably includes secure parser configurations that disable external entity resolution. This vulnerability is particularly relevant for organizations processing Peppol e-invoices, as it could lead to leakage of sensitive internal files, including configuration files, credentials, or other private data. The threat is heightened in environments where Peppol-py runs with elevated privileges or access to sensitive data. Given the widespread adoption of Peppol in Europe for cross-border e-invoicing, this vulnerability has significant implications for European businesses and public sector entities.

Detailed information about CVE-2025-66371: CWE-611 Improper Restriction of XML External Entity Reference in Iteras Peppol-py affecting Iteras Peppol-py. Get rea

CVE-2025-66371: CWE-611 Improper Restriction of XML External Entity Reference in Iteras Peppol-py - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2025-66371: CWE-611 Improper Restriction of XML External Entity Reference in Iteras Peppol-py

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