CVE-2025-49810

Thread summarization allows persistent access to channel

Published Aug 21, 2025 CVSS 3.1 · 3.5 Low EPSS < 1% KEV · Not listed
Description
Mattermost versions 10.5.x <= 10.5.8 fail to validate access controls at time of access which allows user to read a thread via AI posts

Remediation

Vendor Solution

Update Mattermost to versions 10.10.0, 10.5.9 or higher.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-25424 Mattermost Lack of Access Control Validation
Github GHSA Github GHSA GHSA-pwvr-grqg-7vp2 Mattermost Lack of Access Control Validation
References
History
Type Values Removed Values Added
Metrics ssvc

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

Type Values Removed Values Added
First Time appeared Mattermost
Mattermost mattermost
Vendors & Products Mattermost
Mattermost mattermost
Type Values Removed Values Added
Description Mattermost versions 10.5.x <= 10.5.8 fail to validate access controls at time of access which allows user to read a thread via AI posts
Title Thread summarization allows persistent access to channel
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 3.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Mattermost
Published
Updated
Aug 21, 2025, 1:49 PM
Reserved
Jul 22, 2025, 7:53 AM
Status
Analyzed
Published
Aug 21, 2025, 8:15 AM
Modified
Jun 17, 2026, 9:31 AM