CVE-2025-11776

MEDIUM
2025-11-14 [email protected]
4.3
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

3
Patch Released
Mar 31, 2026 - 21:13 nvd
Patch available
Analysis Generated
Mar 28, 2026 - 19:22 vuln.today
CVE Published
Nov 14, 2025 - 08:15 nvd
MEDIUM 4.3

Tags

Authentication Bypass Mattermost Server

Description

Mattermost versions <11 fail to properly restrict access to archived channel search API which allows guest users to discover archived public channels via the `/api/v4/teams/{team_id}/channels/search_archived` endpoint

Analysis

Mattermost versions <11 fail to properly restrict access to archived channel search API which allows guest users to discover archived public channels via the. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

Technical Context

This vulnerability is classified as Incorrect Authorization (CWE-863), which allows attackers to bypass authorization checks to access restricted resources. Mattermost versions <11 fail to properly restrict access to archived channel search API which allows guest users to discover archived public channels via the `/api/v4/teams/{team_id}/channels/search_archived` endpoint Affected products include: Mattermost Mattermost Server.

Affected Products

Mattermost Mattermost Server.

Remediation

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Review and test authorization logic, implement consistent access control checks, use centralized authorization framework.

Priority Score

22
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +22
POC: 0

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CVE-2025-11776 vulnerability details – vuln.today
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