It was found that libreoffice before versions 6.0.7 and 6.1.3 was vulnerable to a directory traversal attack which could be used to execute arbitrary macros bundled with a document. An attacker could craft a document, which when opened by LibreOffice, would execute a Python method from a script in any arbitrary file system location, specified relative to the LibreOffice install location.
https://www.libreoffice.org/about-us/security/advisories/cve-2018-16858/
https://www.exploit-db.com/exploits/46727/
https://seclists.org/bugtraq/2019/Aug/28
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16858
https://access.redhat.com/errata/RHSA-2019:2130
http://packetstormsecurity.com/files/152560/LibreOffice-Macro-Code-Execution.html
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00059.html