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Vulnerability Details :

CVE-2025-27715

Assigner Org ID-9302f53e-dde5-4bf3-b2f2-a83f91ac0eee

Published At-21 Mar, 2025 | 08:22

Updated At-21 Mar, 2025 | 13:35

Auto-Enrollment of Team Admins into Private Channels without explicit consent

Mattermost versions 9.11.x <= 9.11.8 fail to prompt for explicit approval before adding a team admin to a private channel, which team admins to joining private channels via crafted permalink links without explicit consent from them.

EPSS History

Score

Latest Score

N/A

Percentile

Latest Percentile

N/A

▼Common Vulnerabilities and Exposures (CVE)

cve.org

Assigner:Mattermost

Assigner Org ID:9302f53e-dde5-4bf3-b2f2-a83f91ac0eee

Published At:21 Mar, 2025 | 08:22

Updated At:21 Mar, 2025 | 13:35

▼CVE Numbering Authority (CNA)

Auto-Enrollment of Team Admins into Private Channels without explicit consent

Affected Products

Vendor

Mattermost, Inc.

Product

Mattermost

Default Status

unaffected

Versions

Affected

From 9.11.0 through 9.11.8 (semver)

Unaffected

10.5.0
9.11.9

Problem Types

Type	CWE ID	Description
CWE	CWE-863	CWE-863: Incorrect Authorization

Type: CWE

CWE ID: CWE-863

Description: CWE-863: Incorrect Authorization

Metrics

Version	Base score	Base severity	Vector
3.1	3.3	LOW	CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N

Version: 3.1

Base score: 3.3

Base severity: LOW

Vector:

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N

Solutions

Update Mattermost to versions 10.5.0, 9.11.9 or higher.

Credits

finder

Joram Wilander

References

Hyperlink	Resource
https://mattermost.com/security-updates	N/A

Hyperlink: https://mattermost.com/security-updates

Resource: N/A

▼Authorized Data Publishers (ADP)

CISA ADP Vulnrichment

Metrics Other Info

▼National Vulnerability Database (NVD)

nvd.nist.gov

Source:responsibledisclosure@mattermost.com

Published At:21 Mar, 2025 | 09:15

Updated At:27 Mar, 2025 | 15:01

Date Added	Due Date	Vulnerability Name	Required Action
	N/A

Metrics

Type	Version	Base score	Base severity	Vector
Secondary	3.1	3.3	LOW	CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N
Primary	3.1	2.7	LOW	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N

Type: Secondary

Version: 3.1

Base score: 3.3

Base severity: LOW

Vector:

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N

Type: Primary

Version: 3.1

Base score: 2.7

Base severity: LOW

Vector:

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N

CPE Matches

Mattermost, Inc.

>>mattermost_server>>Versions from 9.11.0(inclusive) to 9.11.9(exclusive)

cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*

Weaknesses

CWE ID	Type	Source
CWE-863	Secondary	responsibledisclosure@mattermost.com
CWE-863	Primary	nvd@nist.gov

CWE ID: CWE-863

Type: Secondary

Source: responsibledisclosure@mattermost.com

CWE ID: CWE-863

Type: Primary

Source: nvd@nist.gov

References

Hyperlink	Source	Resource
https://mattermost.com/security-updates	responsibledisclosure@mattermost.com	Vendor Advisory

Hyperlink: https://mattermost.com/security-updates

Source: responsibledisclosure@mattermost.com

Resource:

Vendor Advisory

CVE-2025-27715

Credits

Auto-Enrollment of Team Admins into Private Channels without explicit consent

Vendors

Products

Metrics (CVSS)

Weaknesses

Attack Patterns

Solution/Workaround

References

EPSS History

Score

Latest Score

N/A

Percentile

Latest Percentile

N/A

Stakeholder-Specific Vulnerability Categorization (SSVC)

Affected Products

Affected

Unaffected

Problem Types

Metrics

Metrics Other Info

Impacts

Solutions

Configurations

Workarounds

Exploits

Credits

Timeline

Replaced By

Rejected Reason

References

Affected Products

Metrics

Metrics Other Info

Impacts

Solutions

Configurations

Workarounds

Exploits

Credits

Timeline

Replaced By

Rejected Reason

References

CISA Catalog

Metrics

CPE Matches

Weaknesses

Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References

Change History

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