CVE-2023-1777

Information disclosure in linked message previews

Published Mar 31, 2023 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Description
Mattermost allows an attacker to request a preview of an existing message when creating a new message via the createPost API call, disclosing the contents of the linked message.

Remediation

Vendor Solution

Update Mattermost to version v7.8.0, v7.1.6, v7.7.2, or higher.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2023-0855 Mattermost allows an attacker to request a preview of an existing message when creating a new message via the createPost API call, disclosing the contents of the linked message.
Github GHSA Github GHSA GHSA-3wq5-3f56-v5xc Mattermost vulnerable to information disclosure
References
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Mattermost
Published
Updated
Dec 6, 2024, 11:05 PM
Reserved
Mar 31, 2023, 11:34 AM
Status
Modified
Published
Mar 31, 2023, 12:15 PM
Modified
Jun 17, 2026, 5:28 AM