CVE-2026-21388

CVE-2026-21388 affects Mattermost Plugins versions

EUVD-2026-17395

OpenClaw before 2026.3.8 contains a sender allowlist bypass vulnerability in its Microsoft Teams plugin that allows unauthorized senders to bypass intended authorization checks. When a team/channel route allowlist is configured with an empty groupAllowFrom parameter, the message handler synthesiz...

CVE-2026-34509

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OpenClaw 安全漏洞

OpenClaw is an open-source intelligent artificial assistant developed by OpenClaw. Versions of OpenClaw prior to 2026.3.8 contained security vulnerabilities. These vulnerabilities stemmed from a bypass of the sender whitelist in Microsoft Teams plugins, which could allow unauthorized senders to...

CVE-2026-2476

Mattermost Plugins

GO-2025-4129 Mattermost allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL in github.com/mattermost/mattermost-server

Mattermost allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL in github.com/mattermost/mattermost-server...

Mattermost allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL

Mattermost versions 10.11.x = 10.11.3, 10.5.x = 10.5.11, 10.12.x = 10.12.0 fail to validate the relationship between the post being updated and the MSTeams plugin OAuth flow which allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL...

GHSA-FF85-QW3H-G9VP Mattermost allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL

Mattermost versions 10.11.x = 10.11.3, 10.5.x = 10.5.11, 10.12.x = 10.12.0 fail to validate the relationship between the post being updated and the MSTeams plugin OAuth flow which allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL...

SUSE CVE-2025-27936

Mattermost Plugin MSTeams versions 2.1.0 and Mattermost Server versions 10.5.x =10.5.1 with the MS Teams plugin enabled fail to perform constant time comparison on a MSTeams plugin webhook secret which allows an attacker to retrieve the webhook secret of the MSTeams plugin via a timing attack...