CVE-2025-64403: Apache OpenOffice Calc spreadsheet can contain links to other files, in the form of "external data sources". A missing…
CVE-2025-64403 · Severity: high · CVSS 8.1 · Published 2025-11-12
Apache OpenOffice Calc spreadsheet can contain links to other files, in the form of "external data sources". A missing Authorization vulnerability in Apache OpenOffice allowed an attacker to craft a document that would cause such links
to be loaded without prompt.
This issue affects Apache OpenOffice: through 4.1.15.
Users are recommended to upgrade to version 4.1.16, which fixes the issue.
No. Junglewise Threat Intelligence has no report of CVE-2025-64403 being exploited in the wild.
How severe is CVE-2025-64403?
High severity, with a CVSS score of 8.1, published 12 November 2025.
Which products and versions are affected?
Apache OpenOffice. The advisory does not name versions.
Is there a fix for CVE-2025-64403?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2025-64403?
Check whether you run Apache OpenOffice. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.