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Vulnerability Details :

CVE-2025-6226

Summary
Assigner-Mattermost
Assigner Org ID-9302f53e-dde5-4bf3-b2f2-a83f91ac0eee
Published At-18 Jul, 2025 | 08:48
Updated At-07 Aug, 2025 | 09:53
Rejected At-
Credits

IDOR in CreatePost API allows for timeboxed message disclosure

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:Mattermost
Assigner Org ID:9302f53e-dde5-4bf3-b2f2-a83f91ac0eee
Published At:18 Jul, 2025 | 08:48
Updated At:07 Aug, 2025 | 09:53
Rejected At:
▼CVE Numbering Authority (CNA)
IDOR in CreatePost API allows for timeboxed message disclosure

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.

Affected Products
Vendor
Mattermost, Inc.Mattermost
Product
Mattermost
Default Status
unaffected
Versions
Affected
  • From 10.5.0 through 10.5.6 (semver)
  • From 10.8.0 through 10.8.1 (semver)
  • From 10.7.0 through 10.7.3 (semver)
  • From 9.11.0 through 9.11.16 (semver)
Unaffected
  • 10.9.0
  • 10.5.8
  • 10.8.2
  • 10.7.4
  • 9.11.17
Problem Types
TypeCWE IDDescription
CWECWE-306CWE-306: Missing Authentication for Critical Function
Type: CWE
CWE ID: CWE-306
Description: CWE-306: Missing Authentication for Critical Function
Metrics
VersionBase scoreBase severityVector
3.16.5MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Version: 3.1
Base score: 6.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Update Mattermost to versions 10.9.0, 10.5.7, 10.8.2, 10.7.4, 9.11.17 or higher.

Configurations
Workarounds
Exploits
Credits
finder
Dawid Kulikowski (daw10)
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://mattermost.com/security-updates
N/A
Hyperlink: https://mattermost.com/security-updates
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:responsibledisclosure@mattermost.com
Published At:18 Jul, 2025 | 09:15
Updated At:22 Jul, 2025 | 13:06

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.16.5MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Type: Secondary
Version: 3.1
Base score: 6.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-306Secondaryresponsibledisclosure@mattermost.com
CWE ID: CWE-306
Type: Secondary
Source: responsibledisclosure@mattermost.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://mattermost.com/security-updatesresponsibledisclosure@mattermost.com
N/A
Hyperlink: https://mattermost.com/security-updates
Source: responsibledisclosure@mattermost.com
Resource: N/A

Change History

0
Information is not available yet

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