Mattermost versions 10.5.x <= 10.5.1, 10.4.x <= 10.4.3, 9.11.x <= 9.11.9 fail to prevent Wrangler posts from triggering AI responses. This vulnerability allows users without access to the AI bot to activate it by attaching the activate_ai override property to a post via the Wrangler plugin, provided both the AI and Wrangler plugins are enabled.
Exploitability
AV:NAC:HPR:LUI:NScope
S:UImpact
C:NI:LA:N3.1/CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:NAccess Control