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
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Apache POI: parsing OOXML based files (xlsx, docx, etc.), poi-ooxml could read unexpected data if underlying zip has duplicate zip entry names
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.
- Record
CVE-2025-31672- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-20
- Updated
- 2026-11-02
EUVDEUVD-2025-10668
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.
- Record
EUVD-2025-10668- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-gmg8-593g-7mv3
Apache POI OOXML Vulnerable to Improper Input Validation in OOXML File Parsing
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.
- Record
GHSA-gmg8-593g-7mv3- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-20
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2025-31672- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-20
- Updated
- 2026-11-02
OSV
Apache POI: parsing OOXML based files (xlsx, docx, etc.), poi-ooxml could read unexpected data if underlying zip has duplicate zip entry names
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.
- Record
CVE-2025-31672- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-20
- Updated
- 2026-11-02
OSVDEBIAN-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.
- Record
DEBIAN-CVE-2025-31672- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
Show 4 moreShow less
OSVGHSA-gmg8-593g-7mv3
Apache POI OOXML Vulnerable to Improper Input Validation in OOXML File Parsing
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.
- Record
GHSA-gmg8-593g-7mv3- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-20
- Updated
- 2026-11-02
OSVUBUNTU-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.
- Record
UBUNTU-CVE-2025-31672- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
OSVCLSA-2026-1777941834 No score
TuxCare security update for org.apache.poi (5 CVEs)
TuxCare rebuilt 3 org.apache.poi packages to address 5 CVEs. Fixed in 3.10-FINAL-tuxcare.1.
- Record
CLSA-2026-1777941834- Updated
- 2026-11-02
OSVCLSA-2026-1778028244 No score
TuxCare security update for org.apache.poi:poi-ooxml (1 CVE)
TuxCare rebuilt org.apache.poi:poi-ooxml to address 1 CVE. Fixed in 4.1.2-tuxcare.2.
- Record
CLSA-2026-1778028244- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.apache.poi:poi-ooxmlMaven |
before 5.4.0 | 5.4.0 |
org.apache.poi:poiTuxCare:Maven From an advisory covering 5 CVEs |
3.10-FINAL up to 3.10-FINAL-tuxcare.1 | 3.10-FINAL-tuxcare.1 |
org.apache.poi:poi-ooxmlTuxCare:Maven From an advisory covering 5 CVEs |
3.10-FINAL up to 3.10-FINAL-tuxcare.1 | 3.10-FINAL-tuxcare.1 |
org.apache.poi:poi-scratchpadTuxCare:Maven From an advisory covering 5 CVEs |
3.10-FINAL up to 3.10-FINAL-tuxcare.1 | 3.10-FINAL-tuxcare.1 |
org.apache.poi:poi-ooxmlTuxCare:Maven |
4.1.2 up to 4.1.2-tuxcare.2, plus listed versions 4.1.2-tuxcare.1 |
4.1.2-tuxcare.2 |
libapache-poi-javaDebian:12 |
All versions, plus listed versions 4.0.1-44.0.1-54.0.1-6 |
None known |
libapache-poi-javaDebian:13 |
All versions, plus listed versions 4.0.1-6 |
None known |
libapache-poi-javaDebian:14 |
All versions, plus listed versions 4.0.1-6 |
None known |
org.apache.poi:poi-ooxmlMaven |
before 5.4.0, plus listed versions 3.10-FINAL3.10-beta13.10-beta23.10.13.11 Show 45 moreShow less3.11-beta13.11-beta23.11-beta33.123.12-beta13.133.13-beta13.143.14-beta13.153.15-beta13.15-beta23.163.16-beta13.16-beta23.173.17-beta13.5-FINAL3.5-beta43.5-beta53.5-beta63.63.73.7-beta13.7-beta23.7-beta33.83.8-beta13.8-beta23.8-beta33.8-beta43.8-beta53.94.0.04.0.14.1.04.1.14.1.25.0.05.1.05.2.05.2.15.2.25.2.35.2.4 |
5.4.0 |
libapache-poi-javaUbuntu:16.04:LTS |
All versions, plus listed versions 3.10.1-2 |
None known |
Show 7 moreShow less
| Package | Affected | Fixed |
|---|---|---|
libapache-poi-javaUbuntu:18.04:LTS |
All versions, plus listed versions 3.10.1-34.0.1-1~18.03 |
None known |
libapache-poi-javaUbuntu:20.04:LTS |
All versions, plus listed versions 4.0.1-1 |
None known |
libapache-poi-javaUbuntu:22.04:LTS |
All versions, plus listed versions 4.0.1-14.0.1-24.0.1-3 |
None known |
libapache-poi-javaUbuntu:24.04:LTS |
All versions, plus listed versions 4.0.1-44.0.1-54.0.1-6 |
None known |
libapache-poi-javaUbuntu:25.10 |
All versions, plus listed versions 4.0.1-6 |
None known |
libapache-poi-javaUbuntu:26.10 |
All versions, plus listed versions 4.0.1-6 |
None known |
libapache-poi-javaUbuntu:26.04:LTS |
All versions, plus listed versions 4.0.1-6 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-31672 is a medium vulnerability (CVSS 5.3) in Apache Poi, published April 9, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.38%, the 72nd percentile. Fixed in org.apache.poi:poi-ooxml 5.4.0.
References
Left out here: 2 versions. The JSON record has them.