Mattermost fails to properly enforce read permissions in search API endpoints

Mattermost versions 11.3.x = 11.3.0, 11.2.x = 11.2.2, 10.11.x = 10.11.10 fail to properly enforce read permissions in search API endpoints which allows guest users without read permissions to access posts and files in channels via search API requests. Mattermost Advisory ID: MMSA-2025-00554...

GHSA-CWFJ-642J-GFH4 Mattermost fails to properly enforce read permissions in search API endpoints

Mattermost versions 11.3.x = 11.3.0, 11.2.x = 11.2.2, 10.11.x = 10.11.10 fail to properly enforce read permissions in search API endpoints which allows guest users without read permissions to access posts and files in channels via search API requests. Mattermost Advisory ID: MMSA-2025-00554...

CVE-2026-24692

Mattermost versions 11.3.x = 11.3.0, 11.2.x = 11.2.2, 10.11.x = 10.11.10 fail to properly enforce read permissions in search API endpoints which allows guest users without read permissions to access posts and files in channels via search API requests. Mattermost Advisory ID: MMSA-2025-00554...

CVE-2025-13767 Unauthorized Read Access to Private Channel Posts via Mattermost Jira Plugin

Mattermost versions 11.1.x = 11.1.0, 11.0.x = 11.0.5, 10.12.x = 10.12.3, 10.11.x = 10.11.7 fails to validate user channel membership when attaching Mattermost posts as comments to Jira issues, which allows an authenticated attacker with access to the Jira plugin to read post content and attachmen...

CVE-2025-13767 Unauthorized Read Access to Private Channel Posts via Mattermost Jira Plugin

Mattermost versions 11.1.x = 11.1.0, 11.0.x = 11.0.5, 10.12.x = 10.12.3, 10.11.x = 10.11.7 fails to validate user channel membership when attaching Mattermost posts as comments to Jira issues, which allows an authenticated attacker with access to the Jira plugin to read post content and attachmen...

Mattermost 安全漏洞

Mattermost is an open source collaboration platform from Mattermost, Inc. in the United States. A security vulnerability exists in Mattermost versions 10.5.6 and prior 10.5.x, 10.8.1 and prior 10.8.x, 10.7.3 and prior 10.7.x, and 9.11.16 and prior 9.11.x. The vulnerability stems from a failure to...

Mattermost Security Vulnerabilities

Mattermost is an open source collaboration platform from Mattermost, Inc. in the United States. Mattermost suffers from a security vulnerability that stems from the inability to check if compliance export is enabled when fetching posts from a public channel, allowing users who are not members of...

Mattermost Input Validation Error Vulnerability (CNVD-2023-55047)

Mattermost is an open source collaboration platform from Mattermost, Inc. in the United States. Mattermost suffers from an input validation error vulnerability that stems from Mattermost's inability to validate all parameters when creating scripts that run through the /dialog API, which can be...

Mattermost 安全漏洞

Mattermost is an open source collaboration platform from Mattermost, Inc. in the United States. Mattermost suffers from an input validation error vulnerability that stems from Mattermost's inability to validate all parameters when creating scripts that run through the /dialog API, which can be...