CVE-2025-31672 – Apache POI: parsing OOXML based files (xlsx, docx, etc.), poi-ooxml could read unexpected data if underlying zip has duplicate zip entry names

https://notcve.org/view.php?id=CVE-2025-31672

09 Apr 2025 — Improper Input Validation vulnerability in Apache POI. The issue affects the parsing of OOXML format files like xlsx, docx and pptx. These file formats are basically zip files and it is possible for malicious users to add zip entries with duplicate names (including the path) in the zip. In this case, products reading the affected file could read different data because 1 of the zip entries with the duplicate name is selected over another but different products may choose a different zip entry. This issue aff... • https://bz.apache.org/bugzilla/show_bug.cgi?id=69620 • CWE-20: Improper Input Validation •