OpenXRechnungToolbox through 2024-10-05-3.0.0 before 6c50e89 allows XXE because the disallow-doctype-decl feature is not enabled in visualization/VisualizerImpl.java.
Exploitability
AV:NAC:LPR:LUI:NScope
S:CImpact
C:LI:NA:N5/CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:NInput Validation