JeecgBoot through 3.9.5 contains a missing authorization vulnerability that allows any authenticated user to publish templated system announcements via POST /sys/api/sendBusTemplateAnnouncement. Low-privileged attackers can supply templateCode, toUser, and a forged fromUser to send notifications to arbitrary users through WebSocket, DingTalk, WeCom, Feishu and UniPush channels.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
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