CVE-2026-6957

CVSS Score & Metrics

Base Score

8.0 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H                                    

Vulnerability Description

Mattermost Plugins versions <=1.1.5 fail to sanitize filenames received from federated peers before using them to construct export destination paths, which allows an administrator of a remote federated Mattermost server to write files to arbitrary locations within the target server's filestore via a malicious filename delivered through the shared-channel attachment sync protocol. Mattermost Advisory ID: MMSA-2026-00659

Vulnerability Details

Published Date

May 27, 2026

Last Modified

May 27, 2026

CWE ID

CWE-22

Source

NVD

External References

https://mattermost.com/security-updates

CVSS Score & Metrics

Vulnerability Description

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