What’s Vulnerable › Vulnerabilities

CVE-2026-69115: OpenIM Server v3.8.3 Missing Authorization on User and Group Enumeration Endpoints

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-11 · updated 2026-10-24
• Weakness: CWE-862

Description

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.

Affected products

• OpenIMSDK OpenIM Server (open-im-server): through 3.8.3

References

• https://github.com/openimsdk/open-im-server
• https://github.com/openimsdk/open-im-server/commit/193870b2f938278b27a2d8347bd7e4db5f8f9dfc
• https://github.com/openimsdk/open-im-server/issues/3778
• https://github.com/openimsdk/open-im-server/pull/3781
• https://www.vulncheck.com/advisories/openim-server-missing-authorization-on-user-and-group-enumeration-endpoints
• https://github.com/openimsdk/open-im-server/issues/3778

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