Fossil before 2.10.2, 2.11.x before 2.11.2, and 2.12.x before 2.12.1 allows remote authenticated users to execute arbitrary code. An attacker must have check-in privileges on the repository.
lists.opensuse.org/opensuse-security-announce/2020-09/msg00065.html
www.openwall.com/lists/oss-security/2020/08/25/1
fossil-scm.org/forum/info/a05ae3ce7760daf6
fossil-scm.org/fossil/vdiff?branch=sec2020-2.12-patch&diff=1&w
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ARYF4YMYXCANXUDS3B3CA4JGUZNUJOJA/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GVZK4K7SFBQRCGCHS76HW2LTSEH2KSUM/
security.gentoo.org/glsa/202011-04
www.openwall.com/lists/oss-security/2020/08/20/1