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.
CVSS
- Version: 4.0
- Vector: 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Base score: 7.1
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days: 0.30%
- Percentile among all scored CVEs: 21
- Score date: 10/5/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
🎯 ATT&CK techniques
How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.
- Exploitation
T1210Exploitation of Remote Serviceslateral movement85 % - Primary impact
T1078Valid Accountsstealth · persistence · privilege escalation · initial access90 % - Secondary impact
T1005Data from Local Systemcollection85 %
Acceso remoto autenticado (PR:L, AV:N) a endpoints administrativos sin verificación de permisos (CWE-862). Permite enumeración masiva de usuarios, grupos y datos sensibles de la plataforma.
Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.
🛡️ ATT&CK mitigations that cover these techniques
Affected technologies (1)
⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.
CWEs
- CWE-862
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
Raw JSON (NVD)
Show
{
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"lastModified": "2026-09-24T20:43:32.537",
"sourceIdentifier": "disclosure@vulncheck.com"
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