CVE-2019-9851: Canonical Ubuntu Linux

Critical severity, CVSS 9.8. EPSS: 77.8% chance of exploitation in the next 30 days.

LibreOffice is typically bundled with LibreLogo, a programmable turtle vector graphics script, which can execute arbitrary python commands contained with the document it is launched from. Protection was added, to address CVE-2019-9848, to block calling LibreLogo from document event script handers, e.g. mouse over. However LibreOffice also has a separate feature where documents can specify that pre-installed scripts can be executed on various global script events such as document-open, etc. In the fixed versions, global script event handlers are validated equivalently to document script event handlers. This issue affects: Document Foundation LibreOffice versions prior to 6.2.6.

Affected products

• Canonical Ubuntu Linux: version 16.04 only; version 18.04 only; version 19.04 only
• Debian Debian Linux: version 8.0 only; version 9.0 only; version 10.0 only
• Fedoraproject Fedora: version 29 only
• Libreoffice Libreoffice: before 6.2.6 (fixed in 6.2.6)
• Opensuse Leap: version 15.0 only; version 15.1 only

Published 2019-08-15. Last modified 2026-06-17.