OpenIMSDK OpenIM Server up to 3.8.3 Admin /user/get_users GetPaginationUsers improper authorization

Summaryinfo

A vulnerability classified as problematic has been found in OpenIMSDK OpenIM Server up to 3.8.3. This affects the function GetPaginationUsers of the file /user/get_users of the component Admin Handler. This manipulation causes improper authorization. The identification of this vulnerability is CVE-2026-69115. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in OpenIMSDK OpenIM Server up to 3.8.3. It has been declared as problematic. Affected by this vulnerability is the function GetPaginationUsers of the file /user/get_users of the component Admin Handler. The manipulation with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect confidentiality. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-69115 since 08/03/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/11/2026). MITRE ATT&CK project uses the attack technique T1548.002 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• OpenIMSDK

Name

• OpenIM Server

Version

• 3.8.0
• 3.8.1
• 3.8.2
• 3.8.3

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