CVE-2026-108875 [MEDIUM] – JeecgBoot through 3.9.5 contains a missing authorization vulnerability in the SysUserContr

JeecgBoot through 3.9.5 contains a missing authorization vulnerability in the SysUserController addSysUserGroup handler that allows any authenticated user to modify user group membership. Low-privileged attackers can send POST requests with arbitrary user ids and a groupId to add any users to administrator-maintained groups without permission checks.