Auth bypass in Openimsdk Openim Server (Open-Im-Server)
CVE-2026-69115
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (20.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 20.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Openimsdk Openim Server (Open-Im-Server) — versions 0
Weakness classification (CWE)
References
- github.com/openimsdk/open-im-server (product)
- github.com/openimsdk/open-im-server/issues/3778 (issue-tracking)
- github.com/openimsdk/open-im-server/commit/193870b2f938278b27a2d8347bd7e4db5f8f… (patch)
- github.com/openimsdk/open-im-server/pull/3781 (issue-tracking)
- www.vulncheck.com/advisories/openim-server-missing-authorization-on-user-and-gr… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-69115?
- CVE-2026-69115 is a medium-severity vulnerability in Openimsdk Openim Server (Open-Im-Server), classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-08-11.
- How severe is CVE-2026-69115?
- Medium severity. CVSS v3 base score is 6.5 out of 10.