Vulnerability · Published Nov 12, 2025 · Assigned by apache

CVE-2025-64403Apache OpenOffice: Remote documents loaded without prompt via "external data sources" in Calc

High 8.1

In plain English

A high-severity missing authorization in Apache OpenOffice from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 70% of all known vulnerabilities).

Severity (CVSS 3.1)8.1High

Exploit odds (30 days)1.3%top 30.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Apache Software Foundation	Apache OpenOffice	0 – through 4.1.15

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

References

https://www.openoffice.org/security/cves/CVE-2025-64403.html vendor-advisory
https://lists.apache.org/thread/t7c6jhvdb00xtgd9vvn7h5sq9f4h5trt vendor-advisory
http://www.openwall.com/lists/oss-security/2025/11/11/6