// For flags

CVE-2025-4128

Mattermost Guest User Information Disclosure Vulnerability

Severity Score

3.1
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

Mattermost versions 10.5.x <= 10.5.4, 9.11.x <= 9.11.13 fail to properly restrict API access to team information, allowing guest users to bypass permissions and view information about public teams they are not members of via a direct API call to /api/v4/teams/{team_id}.

Las versiones de Mattermost 10.5.x &lt;= 10.5.4, 9.11.x &lt;= 9.11.13 no restringen adecuadamente el acceso de la API a la información del equipo, lo que permite que los usuarios invitados omitan los permisos y vean información sobre equipos públicos de los que no son miembros a través de una llamada API directa a /api/v4/teams/{team_id}.

These are all security issues fixed in the govulncheck-vulndb-0.0.20250612T141001-1.1 package on the GA media of openSUSE Tumbleweed.

*Credits: hackit_bharat
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Attack Vector
Network
Attack Complexity
High
Authentication
Single
Confidentiality
Partial
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2025-04-30 CVE Reserved
  • 2025-06-11 CVE Published
  • 2025-06-11 CVE Updated
  • 2025-08-18 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-863: Incorrect Authorization
CAPEC
References (1)
URL Tag Source
https://mattermost.com/security-updates
URL Date SRC
URL Date SRC
URL Date SRC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Mattermost
Search vendor "Mattermost"
 Mattermost
Search vendor "Mattermost" for product "Mattermost"
 >= 10.5.0 <= 10.5.4
Search vendor "Mattermost" for product "Mattermost" and version " >= 10.5.0 <= 10.5.4"
en
Affected
Mattermost
Search vendor "Mattermost"
 Mattermost
Search vendor "Mattermost" for product "Mattermost"
 >= 9.11.0 <= 9.11.13
Search vendor "Mattermost" for product "Mattermost" and version " >= 9.11.0 <= 9.11.13"
en
Affected