CVE-2026-108875 JeecgBoot through 3.9.5 Missing Authorization via /sys/user/addSysUserGroup
Low-privileged users can add arbitrary users to administrator groups due to missing authorization checks in the user group management endpoint.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-108875?
CVE-2026-108875 is a medium-severity missing authorization vulnerability in JeecgBoot, published on 11 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-862
Which versions are affected by CVE-2026-108875?
How do I fix CVE-2026-108875?
No fix has been published for CVE-2026-108875 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-108875 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108875 exists.
Sources
Also known as GHSA-2qrq-xr6v-mr65.