CVE-2025-49222
MEDIUM EPSS 19.8%
Published Aug 21, 202510mo ago · Modified Jun 17, 20262w ago
6.8 CVSS 3.1
Published Aug 21, 2025 10mo ago
Last Modified Jun 17, 2026 2w ago
Description
Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.9.x <= 10.9.2, 10.10.x <= 10.10.0 fail to validate upload types in remote cluster upload sessions which allows a system admin to upload non-attachment file types via shared channels that could potentially be placed in arbitrary filesystem directories.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N Attack Vector Network
Attack Complexity Low
Privileges Required High
User Interaction None
Scope Changed
Confidentiality None
Integrity High
Availability None
Threat Intelligence
EPSS Exploit Probability
19.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-434 Unrestricted Upload of File with Dangerous Type Resource Mgmt
Affected Products 5
| Vendor | Product | Version | Range |
|---|---|---|---|
| mattermost | mattermost_server | * | ≥9.11.0 – <9.11.18 |
| mattermost | mattermost_server | * | ≥10.5.0 – <10.5.9 |
| mattermost | mattermost_server | * | ≥10.8.0 – <10.8.4 |
| mattermost | mattermost_server | * | ≥10.9.0 – <10.9.3 |
| mattermost | mattermost_server | 10.10.0 | any |
References 1
- mattermost.com https://mattermost.com/security-updates
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.