CVE-2025-9076
published 2025-09-15CVE-2025-9076: Mattermost versions 10.10.x <= 10.10.1 fail to properly sanitize user data during shared channel membership synchronization, which allows malicious or…
medium6.5CVSS 3.1
AVNACLPRLUINSUCHINAN
Mattermost versions 10.10.x <= 10.10.1 fail to properly sanitize user data during shared channel membership synchronization, which allows malicious or compromised remote clusters to access sensitive user information via unsanitized user objects. This vulnerability affects Mattermost Server instances with shared channels enabled.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| github.com | mattermost_mattermost-server | >= 10.10.0 < 10.10.2 | 10.10.2 |
| github.com | mattermost_mattermost-server | >= 10.10.0+incompatible < 10.10.2+incompatible | 10.10.2+incompatible |
| github.com | mattermost_mattermost_server_v8 | >= 0 < 8.0.0-20250729073403-517ae758cd02 | 8.0.0-20250729073403-517ae758cd02 |
| mattermost | mattermost | 10.10.0 – 10.10.1 | — |
| mattermost | mattermost_server | >= 10.10.0 < 10.10.2 | 10.10.2 |
| msrc | cbl_mariner_1.0_arm | — | — |
| msrc | cbl_mariner_1.0_x64 | — | — |
| msrc | cm1_binutils_2.32-4_on_cbl_mariner_1.0 | — | — |