Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the Host header when constructing response URLs for custom slash commands. An attacker can redirect responses to a server under their control by sending a specially crafted request with a spoofed Hos...

GHSA-VQP5-2MRP-QQXG 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...

GHSA-WVCV-9XPM-7MQC 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-2026-28732

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-2026-6333 SSRF via Host Header Spoofing in Custom Slash Commands

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-2026-6333

Mattermost versions 11.5.x <= 11.5.1 and 10.11.x

CVE-2026-6333 SSRF via Host Header Spoofing in Custom Slash Commands

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...

EUVD-2026-30755

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-2026-6333

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-2026-6333 SSRF via Host Header Spoofing in Custom Slash Commands

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...

EUVD-2026-30760

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-2026-41656

Name of the Vulnerable Software and Affected Versions Mattermost versions 11.5.0 through 11.5.1 Mattermost versions 10.11.0 through 10.11.13 Description An issue exists where the software fails to validate the Host header when constructing response URLs for custom slash commands. This allows an...

Duplicate Advisory: OpenClaw: Owner-enforced commands could accept wildcard channel senders as command owners

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-c28g-vh7m-fm7v. This link is maintained to preserve external references. Original Description OpenClaw before 2026.4.21 contains an authorization bypass vulnerability in command-auth.ts that allows non-owner...

CVE-2026-44991 OpenClaw < 2026.4.21 - Authorization Bypass in Owner-Enforced Commands via Wildcard Channel Senders

OpenClaw before 2026.4.21 contains an authorization bypass vulnerability in command-auth.ts that allows non-owner senders to execute owner-enforced slash commands when wildcard inbound senders are configured without explicit owner allowFrom settings. Attackers can exploit this by sending commands...

EUVD-2026-25332

OpenClaw before 2026.3.31 contains an authorization bypass vulnerability in Discord slash command and autocomplete paths that fail to enforce group DM channel allowlist restrictions. Authorized Discord users can bypass channel restrictions by invoking slash commands, allowing access to restricted...

GHSA-QGP3-3RJ7-QQQ4 Duplicate Advisory: OpenClaw: Discord Slash Commands Bypass Group DM Channel Allowlist

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-rvvf-6vh3-9j43. This link is maintained to preserve external references. Original Description OpenClaw before 2026.3.31 contains an authorization bypass vulnerability in Discord slash command and autocomplete...

Duplicate Advisory: OpenClaw: Discord Slash Commands Bypass Group DM Channel Allowlist

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-rvvf-6vh3-9j43. This link is maintained to preserve external references. Original Description OpenClaw before 2026.3.31 contains an authorization bypass vulnerability in Discord slash command and autocomplete...

CVE-2026-41348

OpenClaw before 2026.3.31 contains an authorization bypass vulnerability in Discord slash command and autocomplete paths that fail to enforce group DM channel allowlist restrictions. Authorized Discord users can bypass channel restrictions by invoking slash commands, allowing access to restricted...

CVE-2026-41348

OpenClaw before 2026.3.31 contains an authorization bypass vulnerability in Discord slash command and autocomplete paths that fail to enforce group DM channel allowlist restrictions. Authorized Discord users can bypass channel restrictions by invoking slash commands, allowing access to restricted...