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Status published
Medium
CVE-2023-2787
Collapsed Reply Threads APIs leak message contents from private channels
Vulnerability Description
Mattermost fails to check channel membership when accessing message threads, allowing an attacker to access arbitrary posts by using the message threads API.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- Juho Nurminen
References
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Affected Vendor
Mattermost
View all reports →Affected Software
Mattermost
Vulnerable Versions:
0, 7.10.0, 7.9.3, 7.8.4, 7.1.9, 7.10.1
Timeline
Official Publish:
June 16th, 2023
Last Modified:
December 6th, 2024
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N