CVE-2019-9852: Canonical Ubuntu Linux

High severity, CVSS 7.8. EPSS: 1.8% chance of exploitation in the next 30 days.

LibreOffice has a feature where documents can specify that pre-installed macros can be executed on various script events such as mouse-over, document-open etc. Access is intended to be restricted to scripts under the share/Scripts/python, user/Scripts/python sub-directories of the LibreOffice install. Protection was added, to address CVE-2018-16858, to avoid a directory traversal attack where scripts in arbitrary locations on the file system could be executed. However this new protection could be bypassed by a URL encoding attack. In the fixed versions, the parsed url describing the script location is correctly encoded before further processing. 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.