Sympa before 6.2.59b.2 allows remote attackers to obtain full SOAP API access by sending any arbitrary string (except one from an expired cookie) as the cookie value to authenticateAndRun.
bugs.debian.org/cgi-bin/bugreport.cgi?bug=976020
github.com/sympa-community/sympa/blob/6.2.59b.2/NEWS.md
github.com/sympa-community/sympa/issues/1041
github.com/sympa-community/sympa/pull/1044
lists.debian.org/debian-lts-announce/2020/12/msg00026.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EFZWDEKQFW3EH665OECDWIWM2MI7T53Y/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JICIHAJKKCZXJNIICUDYXGZFQCN6J4U6/
www.debian.org/security/2020/dsa-4818