The call parameter of /lib/exe/ajax.php in DokuWiki through 2017-02-19e does not properly encode user input, which leads to a reflected file download vulnerability, and allows remote attackers to run arbitrary programs.
github.com/splitbrain/dokuwiki/commit/238b8e878ad48f370903465192b57c2072f65d86
github.com/splitbrain/dokuwiki/issues/2029
github.com/splitbrain/dokuwiki/pull/2019
hackerone.com/reports/238316
lists.debian.org/debian-lts-announce/2018/02/msg00004.html
lists.debian.org/debian-lts-announce/2018/07/msg00004.html
vulnhive.com/2018/000004