CVE-2025-64407: Apache OpenOffice: URL fetching can be used to exfiltrate arbitrary INI file values and environment variables

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-11-12 · updated 2026-10-18
Weakness: CWE-201

Description

Apache OpenOffice documents can contain links. A missing Authorization vulnerability in Apache OpenOffice allowed an attacker to craft a document that would cause external links to be loaded without prompt. Such links could also be used to transmit system information, such as environment variables or configuration settings. In the affected versions of Apache OpenOffice, documents that used a certain URI scheme linking to external files would load the contents of such files without prompting the user for permission to do so. Such URI scheme allows to include system configuration data, that is not supposed to be transmitted externally. This issue affects Apache OpenOffice: through 4.1.15. Users are recommended to upgrade to version 4.1.16, which fixes the issue. The LibreOffice suite reported this issue as CVE-2024-12426.

Affected products

Apache Software Foundation Apache OpenOffice: before 4.1.16 — fixed in 4.1.16

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache OpenOffice 4.1.16. Check the vendor advisory for mitigations.

References

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