The automatic update feature in KeePass 2.33 and earlier allows man-in-the-middle attackers to execute arbitrary code by spoofing the version check response and supplying a crafted update.
https://sourceforge.net/p/keepass/discussion/329220/thread/e430cc12/
https://packetstormsecurity.com/files/137274/KeePass-2-Man-In-The-Middle.html
https://euvd.enisa.europa.eu/vulnerability/EUVD-2016-6070
https://bogner.sh/2016/03/mitm-attack-against-keepass-2s-update-check/