CVE-2025-49810: Mattermost Lack of Access Control Validation

August 21, 2025 (updated August 29, 2025)

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

References

github.com/advisories/GHSA-pwvr-grqg-7vp2
github.com/mattermost/mattermost
mattermost.com/security-updates
nvd.nist.gov/vuln/detail/CVE-2025-49810
pkg.go.dev/vuln/GO-2025-3903

Code Behaviors & Features

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