An attacker can add themselves to arbitrary groups by supplying a valid group ID, which can be obtained via other application functionalities (e.g. /customer/servlet/mco/webapi/group/picker/groups), provided he has necessary permissions, or potentially inferred through brute-force techniques.
Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.
Metrics
Affected Vendors & Products
No advisories yet.
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Mon, 06 Jul 2026 23:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mycomplianceoffice
Mycomplianceoffice mco |
|
| Vendors & Products |
Mycomplianceoffice
Mycomplianceoffice mco |
Fri, 03 Jul 2026 14:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Wed, 01 Jul 2026 12:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | MCO does not properly enforce authorization checks in the /customer/servlet/mco/webapi/profile-sections/group-membership endpoint. An authenticated user can modify their group membership without proper authorization checks, allowing privilege escalation. An attacker can add themselves to arbitrary groups by supplying a valid group ID, which can be obtained via other application functionalities (e.g. /customer/servlet/mco/webapi/group/picker/groups), provided he has necessary permissions, or potentially inferred through brute-force techniques. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions. | |
| Title | Privilege Escalation in MCO | |
| Weaknesses | CWE-266 CWE-863 |
|
| References |
| |
| Metrics |
cvssV4_0
|
Projects
Sign in to view the affected projects.
Status: PUBLISHED
Assigner: CERT-PL
Published:
Updated: 2026-07-01T13:42:53.914Z
Reserved: 2026-06-11T07:44:52.179Z
Link: CVE-2026-53902
Updated: 2026-07-01T13:42:50.608Z
Status : Analyzed
Published: 2026-07-01T13:17:45.237
Modified: 2026-07-06T17:39:04.233
Link: CVE-2026-53902
No data.
OpenCVE Enrichment
Updated: 2026-07-31T15:45:10Z