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OpenAdvisories
Low · 3.5 CVE-2025-49810 EUVD-2025-25424GHSA-pwvr-grqg-7vp2GO-2025-3903

Thread summarization allows persistent access to channel

Published Aug 21, 2025 · Updated Aug 21, 2025 · Assigned by Mattermost

Vendor: Mattermost Product: Mattermost Package: github.com/mattermost/mattermost-server Package: github.com/mattermost/mattermost-server/v5 Package: github.com/mattermost/mattermost-server/v6 Package: github.com/mattermost/mattermost/server/v8 Ecosystem: Go

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

Affected products

VendorProductAffectedFixed
Mattermost Mattermost 10.5.0 – ≤ 10.5.8 10.10.0

Affected packages

EcosystemPackageAffectedFixedRecord
Go github.com/mattermost/mattermost-server >= 10.5.0, < 10.5.9 10.5.9 GHSA-pwvr-grqg-7vp2
Go github.com/mattermost/mattermost-server >= 10.5.0+incompatible, < 10.5.9+incompatible 10.5.9+incompatible GO-2025-3903
Go github.com/mattermost/mattermost-server/v5 all versions — GO-2025-3903
Go github.com/mattermost/mattermost-server/v6 all versions — GO-2025-3903
Go github.com/mattermost/mattermost/server/v8 < 8.0.0-20250721095846-c602a4a78e1f 8.0.0-20250721095846-c602a4a78e1f GHSA-pwvr-grqg-7vp2

Advisories 1

References