CVE-2025-31672: poi Input Validation Flaw — Fix

Description

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 affects Apache POI poi-ooxml before 5.4.0. poi-ooxml 5.4.0 has a check that throws an exception if zip entries with duplicate file names are found in the input file. Users are recommended to upgrade to version poi-ooxml 5.4.0, which fixes the issue. Please read https://poi.apache.org/security.html for recommendations about how to use the POI libraries securely.

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CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Weakness Type (CWE)

CWE-20 Improper Input Validation

Affected Products

Vendor	Product	Versions
apache	poi	< 5.4.0
netapp	active_iq_unified_manager	All
netapp	active_iq_unified_manager	All
netapp	active_iq_unified_manager	All

References

Advisories & Patches

https://lists.apache.org/thread/k14w8vcjqy4h34hh5kzldko78kpylkq5

Other References

https://bz.apache.org/bugzilla/show_bug.cgi?id=69620 http://www.openwall.com/lists/oss-security/2025/04/08/2 https://security.netapp.com/advisory/ntap-20250523-0004/

Frequently Asked Questions

What is CVE-2025-31672? +

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 affects Apache POI poi-ooxml before 5.4.0. poi-ooxml 5.4.0 has a check that throws an exception if zip entries with duplicate file names are found in the input file. Users are recommended to upgrade to version poi-ooxml 5.4.0, which fixes the issue. Please read https://poi.apache.org/security.html for recommendations about how to use the POI libraries securely. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2025-31672? +

CVE-2025-31672 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-31672? +

CVE-2025-31672 affects products from apache, netapp, specifically: active_iq_unified_manager, poi. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-31672? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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