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OpenAdvisories
Medium · 6.5 CVE-2023-2792 EUVD-2023-34248GHSA-9v8g-3666-2499

Ephemeral messages return private channel contents in permalink previews

Published Jun 16, 2023 · Updated Dec 6, 2024 · Assigned by Mattermost

Description

Mattermost fails to sanitize ephemeral error messages, allowing an attacker to obtain arbitrary message contents by a specially crafted /groupmsg command.

Affected products

VendorProductAffectedFixed
Mattermost Mattermost ≤ 7.1.9, ≤ 7.8.4, ≤ 7.9.3, 7.10.0 7.1.10

References