PT-2026-29239

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...

GO-2026-4784 Mattermost Microsoft Teams Plugin fails to properly mask sensitive configuration values in github.com/mattermost/mattermost-plugin-msteams

Mattermost Microsoft Teams Plugin fails to properly mask sensitive configuration values in github.com/mattermost/mattermost-plugin-msteams...

Mattermost Microsoft Teams Plugin fails to properly mask sensitive configuration values

Mattermost Plugins versions =2.0.3.0 fail to properly mask sensitive configuration values which allows an attacker with access to support packets to obtain original plugin settings via exported configuration data. Mattermost Advisory ID: MMSA-2026-00606...

CVE-2026-2476 MS Teams plugin sensitive config values not properly masked in support packets

Mattermost Plugins versions =2.0.3.0 fail to properly mask sensitive configuration values which allows an attacker with access to support packets to obtain original plugin settings via exported configuration data. Mattermost Advisory ID: MMSA-2026-00606...

CVE-2026-2476

Mattermost Plugins

CVE-2023-45756

Unauth. Reflected Cross-Site Scripting XSS vulnerability in Spider Teams ApplyOnline – Application Form Builder and Manager plugin = 2.5.2 versions...

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...

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...

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...

Missing Authentication for Critical Function

Overview Affected versions of this package are vulnerable to Missing Authentication for Critical Function via the MSTeams plugin OAuth flow. An attacker can modify arbitrary posts by sending a crafted OAuth redirect URL. Remediation Upgrade github.com/mattermost/mattermost/server/channels/web to...

Missing Authentication for Critical Function

Overview Affected versions of this package are vulnerable to Missing Authentication for Critical Function via the MSTeams plugin OAuth flow. An attacker can modify arbitrary posts by sending a crafted OAuth redirect URL. Remediation Upgrade...

CVE-2025-55073

Mattermost Server contains CVE-2025-55073: versions 10.11.x (<=10.11.3), 10.5.x (<=10.5.11), and 10.12.x (

CVE-2025-55073 MS Teams plugin OAuth allows editing arbitrary posts

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...

CVE-2025-55073 MS Teams plugin OAuth allows editing arbitrary posts

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...

CVE-2025-27936 Webhook Secret Exposure via Timing attack in MSteams plugin

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...

Mattermost Plugin MSTeams 安全漏洞

Mattermost Plugin MSTeams is a Mattermost plugin from Mattermost USA. A security vulnerability exists in Mattermost Plugin MSTeams versions prior to 2.1.0, which stems from a webhook key comparison that does not use a constant time algorithm, which could lead to a key disclosure...