// For flags

CVE-2025-6226

IDOR in CreatePost API allows for timeboxed message disclosure

Severity Score

6.5
*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 <= 10.5.6, 10.8.x <= 10.8.1, 10.7.x <= 10.7.3, 9.11.x <= 9.11.16 fail to verify authorization when retrieving cached posts by PendingPostID which allows an authenticated user to read posts in private channels they don't have access to via guessing the PendingPostID of recently created posts.

Las versiones de Mattermost 10.5.x &lt;= 10.5.6, 10.8.x &lt;= 10.8.1, 10.7.x &lt;= 10.7.3, 9.11.x &lt;= 9.11.16 no pueden verificar la autorización al recuperar publicaciones en caché mediante PendingPostID, lo que permite que un usuario autenticado lea publicaciones en canales privados a los que no tiene acceso al adivinar el PendingPostID de publicaciones creadas recientemente.

*Credits: Dawid Kulikowski (daw10)
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Attack Vector
Network
Attack Complexity
Low
Authentication
Single
Confidentiality
Complete
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2025-06-18 CVE Reserved
  • 2025-07-18 CVE Published
  • 2025-08-07 CVE Updated
  • 2025-08-19 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-306: Missing Authentication for Critical Function
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 <= 10.5.6
Search vendor "Mattermost" for product "Mattermost" and version " >= 10.5.0 <= 10.5.6"
en
Affected
Mattermost
Search vendor "Mattermost"
 Mattermost
Search vendor "Mattermost" for product "Mattermost"
 >= 10.8.0 <= 10.8.1
Search vendor "Mattermost" for product "Mattermost" and version " >= 10.8.0 <= 10.8.1"
en
Affected
Mattermost
Search vendor "Mattermost"
 Mattermost
Search vendor "Mattermost" for product "Mattermost"
 >= 10.7.0 <= 10.7.3
Search vendor "Mattermost" for product "Mattermost" and version " >= 10.7.0 <= 10.7.3"
en
Affected
Mattermost
Search vendor "Mattermost"
 Mattermost
Search vendor "Mattermost" for product "Mattermost"
 >= 9.11.0 <= 9.11.16
Search vendor "Mattermost" for product "Mattermost" and version " >= 9.11.0 <= 9.11.16"
en
Affected