CVE-2021-25631: Libreoffice

High severity, CVSS 8.8. EPSS: 5% chance of exploitation in the next 30 days.

In the LibreOffice 7-1 series in versions prior to 7.1.2, and in the 7-0 series in versions prior to 7.0.5, the denylist can be circumvented by manipulating the link so it doesn't match the denylist but results in ShellExecute attempting to launch an executable type.

Affected products

• Libreoffice Libreoffice: from 7.0.0, before 7.0.5 (fixed in 7.0.5); from 7.1.0, before 7.1.2 (fixed in 7.1.2)

Published 2021-05-03. Last modified 2026-06-17.