CVE-2026-6333

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13 fail to validate the Host header when constructing response URLs for custom slash commands which allows an authenticated attacker to redirect slash command responses to an attacker-controlled server via a spoofed Host header.. Mattermost...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization via the command update API. An attacker can impersonate existing system or custom commands by editing their own slash command trigger to match an already-registered trigger, potentially hijacking command...

Mattermost doesn't validate the Host header when constructing response URLs for custom slash command

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13 fail to validate the Host header when constructing response URLs for custom slash commands which allows an authenticated attacker to redirect slash command responses to an attacker-controlled server via a spoofed Host header.. Mattermost...

Mattermost doesn't enforce slash command trigger-word uniqueness during command updates

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13, 11.4.x = 11.4.3 Fail to enforce slash command trigger-word uniqueness during command updates which allows an authenticated team member with Manage Own Slash Commands permission to hijack and impersonate existing system or custom slash...

CVE-2026-6333

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13 fail to validate the Host header when constructing response URLs for custom slash commands which allows an authenticated attacker to redirect slash command responses to an attacker-controlled server via a spoofed Host header.. Mattermost...

CVE-2026-28732 Slash command trigger-word update allowed command hijacking

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13, 11.4.x = 11.4.3 Fail to enforce slash command trigger-word uniqueness during command updates which allows an authenticated team member with Manage Own Slash Commands permission to hijack and impersonate existing system or custom slash...

CVE-2026-28732

Mattermost fixes are for versions 11.5.x (up to 11.5.1), 10.11.x (up to 10.11.13), and 11.4.x (up to 11.4.3). The issue is a failure to enforce slash command trigger-word uniqueness during command updates, allowing an authenticated team member with Manage Own Slash Commands permission to hijack o...

CVE-2026-28732

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13, 11.4.x = 11.4.3 Fail to enforce slash command trigger-word uniqueness during command updates which allows an authenticated team member with Manage Own Slash Commands permission to hijack and impersonate existing system or custom slash...

CVE-2026-28732 Slash command trigger-word update allowed command hijacking

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13, 11.4.x = 11.4.3 Fail to enforce slash command trigger-word uniqueness during command updates which allows an authenticated team member with Manage Own Slash Commands permission to hijack and impersonate existing system or custom slash...

PT-2026-41649

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13, 11.4.x = 11.4.3 Fail to enforce slash command trigger-word uniqueness during command updates which allows an authenticated team member with Manage Own Slash Commands permission to hijack and impersonate existing system or custom slash...

Mattermost 代码问题漏洞

Mattermost is an open-source collaboration platform developed by the American company Mattermost. Versions of Mattermost such as 11.5.1 and earlier 11.5.x series as well as 10.11.13 and earlier 10.11.x series have code vulnerabilities. These vulnerabilities stem from the lack of validation of the...

GHSA-9Q36-67VC-RRWG OpenClaw: Sandboxed /acp spawn requests could initialize host ACP sessions

Summary Sandboxed requester sessions could reach host-side ACP session initialization through /acp spawn. OpenClaw already blocked sessionsspawn runtime: "acp" from sandboxed sessions, but the slash-command path initialized ACP directly without applying the same host-runtime guard first. Affected...

CVE-2026-28392

OpenClaw versions prior to 2026.2.14 contain a privilege escalation vulnerability in the Slack slash-command handler that incorrectly authorizes any direct message sender when dmPolicy is set to open must be configured. Attackers can execute privileged slash commands via direct message to bypass...

CVE-2026-28392

OpenClaw Slack slash-command handler in OpenClaw versions prior to 2026.2.14 contains a privilege-escalation flaw. When dmPolicy is set to open, direct messages are incorrectly authorized, allowing attackers to execute privileged slash commands via DM and bypass allowlist/ access-group restrictio...

EUVD-2026-9892

OpenClaw versions prior to 2026.2.14 contain a privilege escalation vulnerability in the Slack slash-command handler that incorrectly authorizes any direct message sender when dmPolicy is set to open must be configured. Attackers can execute privileged slash commands via direct message to bypass...

CVE-2026-28392 OpenClaw < 2026.2.14 - Privilege Escalation in Slack Slash Command Handler via Direct Messages

OpenClaw versions prior to 2026.2.14 contain a privilege escalation vulnerability in the Slack slash-command handler that incorrectly authorizes any direct message sender when dmPolicy is set to open must be configured. Attackers can execute privileged slash commands via direct message to bypass...

CVE-2026-28392 OpenClaw < 2026.2.14 - Privilege Escalation in Slack Slash Command Handler via Direct Messages

OpenClaw versions prior to 2026.2.14 contain a privilege escalation vulnerability in the Slack slash-command handler that incorrectly authorizes any direct message sender when dmPolicy is set to open must be configured. Attackers can execute privileged slash commands via direct message to bypass...

Improper Authorization

Overview openclaw is a 🦞 OpenClaw — Personal AI Assistant Affected versions of this package are vulnerable to Improper Authorization via the slash-command handler. An attacker can execute privileged commands by sending direct messages to the bot, bypassing intended allowlist or access-group...

CVE-2018-21254

An issue was discovered in Mattermost Server before 5.1. An attacker can bypass intended access control for direct-message channel creation via the Message slash command...

CVE-2017-18886

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. It allows a bypass of restrictions on use of slash commands...