CVE-2026-69115
OpenIM Server v3.8.3 Missing Authorization on User and Group Enumeration Endpoints
OpenIM Server v3.8.3 contains a missing authorization vulnerability that allows any authenticated user to access admin-only management API endpoints by submitting POST requests with a regular user bearer token to /user/get_users, /user/get_all_users_uid, and /group/get_groups. Attackers can exploit the absent authverify.CheckAdmin() call in the GetPaginationUsers, GetAllUserID, and GetGroups handlers to enumerate all platform user accounts including userIDs, nicknames, and manager level flags, as well as all groups including private groups the user has never joined, exposing group names, owner IDs, and member counts.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckFix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| OpenIM Server (open-im-server) OpenIMSDK |
≥ 0; ≤ 3.8.3 (affected, semver)
Other versions: affected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 7.1 high |
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 6.5 medium |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N | CNA: VulnCheck |
Exploit evidence
- https://github.com/openimsdk/open-im-server/issues/3778
exploit · ADP: CISA-ADP
References
- https://github.com/openimsdk/open-im-serverCNA: VulnCheck · product
- https://github.com/openimsdk/open-im-server/issues/3778CNA: VulnCheck · issue-tracking
- https://github.com/openimsdk/open-im-server/commit/193870b2f938278b27a2d8347bd7e4db5f8f9dfcCNA: VulnCheck · patch
- https://github.com/openimsdk/open-im-server/pull/3781CNA: VulnCheck · issue-tracking, patch
- https://www.vulncheck.com/advisories/openim-server-missing-authorization-on-user-and-group-enumeration-endpointsCNA: VulnCheck · third-party-advisory
- https://github.com/openimsdk/open-im-server/issues/3778ADP: CISA-ADP · exploit
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