rootpwn

medium · CVSS v3 4.3 · EPSS 0.00176

CVE-2026-18560

Mattermost versions 11.10.x <= 11.10.0, 11.7.x <= 11.7.9, 11.9.x <= 11.9.1, 11.8.x <= 11.8.5 fail to validate user’s per…

Description

Mattermost versions 11.10.x <= 11.10.0, 11.7.x <= 11.7.9, 11.9.x <= 11.9.1, 11.8.x <= 11.8.5 fail to validate user’s permissions before other validations which allows non-content reviewers to infer a post’s flagged status via direct API call.. Mattermost Advisory ID: MMSA-2026-00754

Scores

Severity
medium
CVSS v2
4
CVSS v3
4.3
CVSS v4
—
EPSS
0.00176

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