CVE-2025-53971 - Vulnerability Details - OpenCVE

Mattermost versions 10.5.x <= 10.5.8, 9.11.x <= 9.11.17 fail to properly validate authorization for team scheme role modifications which allows Team Admins to demote Team Members to Guests via the PUT /api/v4/teams/team-id/members/user-id/schemeRoles API endpoint.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Vendors	Products
Mattermost	Mattermost

No data.

No data.

References

Link	Providers
https://mattermost.com/security-updates

History

Thu, 21 Aug 2025 15:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Thu, 21 Aug 2025 12:45:00 +0000

Type	Values Removed	Values Added
First Time appeared		Mattermost Mattermost mattermost
Vendors & Products		Mattermost Mattermost mattermost

Thu, 21 Aug 2025 07:45:00 +0000

Type	Values Removed	Values Added
Description		Mattermost versions 10.5.x <= 10.5.8, 9.11.x <= 9.11.17 fail to properly validate authorization for team scheme role modifications which allows Team Admins to demote Team Members to Guests via the PUT /api/v4/teams/team-id/members/user-id/schemeRoles API endpoint.
Title		Channel and Team Membership APIs inadvertently allow loss of Member privileges.
Weaknesses		CWE-863
References		https://mattermost.com/security-updates
Metrics		cvssV3_1 `{'score': 3.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N'}`

MITRE

Status: PUBLISHED

Assigner: Mattermost

Published: 2025-08-21T07:31:01.870Z

Updated: 2025-08-21T14:51:19.669Z

Reserved: 2025-07-22T07:46:53.204Z

Link: CVE-2025-53971

Vulnrichment

Updated: 2025-08-21T14:51:16.544Z

NVD

Status : Undergoing Analysis

Published: 2025-08-21T08:15:30.540

Modified: 2025-08-22T18:09:17.710

Link: CVE-2025-53971

Redhat

No data.

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2025-53971", "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "state": "PUBLISHED", "assignerShortName": "Mattermost", "dateReserved": "2025-07-22T07:46:53.204Z", "datePublished": "2025-08-21T07:31:01.870Z", "dateUpdated": "2025-08-21T14:51:19.669Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "Mattermost", "vendor": "Mattermost", "versions": [{"lessThanOrEqual": "10.5.8", "status": "affected", "version": "10.5.0", "versionType": "semver"}, {"lessThanOrEqual": "9.11.17", "status": "affected", "version": "9.11.0", "versionType": "semver"}, {"version": "10.10.0", "status": "unaffected"}, {"version": "10.5.9", "status": "unaffected"}, {"version": "9.11.18", "status": "unaffected"}]}], "credits": [{"lang": "en", "type": "finder", "value": "hackit_bharat"}], "descriptions": [{"lang": "en", "value": "Mattermost versions 10.5.x <= 10.5.8, 9.11.x <= 9.11.17 fail to properly validate authorization for team scheme role modifications which allows Team Admins to demote Team Members to Guests via the PUT /api/v4/teams/team-id/members/user-id/schemeRoles API endpoint."}], "metrics": [{"cvssV3_1": {"attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE", "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N", "baseSeverity": "LOW", "baseScore": 3.8}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "description": "CWE-863: Incorrect Authorization", "cweId": "CWE-863"}]}], "references": [{"url": "https://mattermost.com/security-updates"}], "solutions": [{"value": "Update Mattermost to versions 10.10.0, 10.5.9, 9.11.18 or higher.", "lang": "en"}], "source": {"advisory": "MMSA-2025-00485", "defect": ["https://mattermost.atlassian.net/browse/MM-64177"], "discovery": "EXTERNAL"}, "title": "Channel and Team Membership APIs inadvertently allow loss of Member privileges.", "providerMetadata": {"orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "shortName": "Mattermost", "dateUpdated": "2025-08-21T07:31:01.870Z"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2025-08-21T14:51:10.911929Z", "id": "CVE-2025-53971", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-08-21T14:51:19.669Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-53971", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-08-21T14:51:10.911929Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-08-21T14:51:16.544Z"}}], "cna": {"title": "Channel and Team Membership APIs inadvertently allow loss of Member privileges.", "source": {"defect": ["https://mattermost.atlassian.net/browse/MM-64177"], "advisory": "MMSA-2025-00485", "discovery": "EXTERNAL"}, "credits": [{"lang": "en", "type": "finder", "value": "hackit_bharat"}], "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 3.8, "attackVector": "NETWORK", "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "LOW"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "Mattermost", "product": "Mattermost", "versions": [{"status": "affected", "version": "10.5.0", "versionType": "semver", "lessThanOrEqual": "10.5.8"}, {"status": "affected", "version": "9.11.0", "versionType": "semver", "lessThanOrEqual": "9.11.17"}, {"status": "unaffected", "version": "10.10.0"}, {"status": "unaffected", "version": "10.5.9"}, {"status": "unaffected", "version": "9.11.18"}], "defaultStatus": "unaffected"}], "solutions": [{"lang": "en", "value": "Update Mattermost to versions 10.10.0, 10.5.9, 9.11.18 or higher."}], "references": [{"url": "https://mattermost.com/security-updates"}], "descriptions": [{"lang": "en", "value": "Mattermost versions 10.5.x <= 10.5.8, 9.11.x <= 9.11.17 fail to properly validate authorization for team scheme role modifications which allows Team Admins to demote Team Members to Guests via the PUT /api/v4/teams/team-id/members/user-id/schemeRoles API endpoint."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-863", "description": "CWE-863: Incorrect Authorization"}]}], "providerMetadata": {"orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "shortName": "Mattermost", "dateUpdated": "2025-08-21T07:31:01.870Z"}}}, "cveMetadata": {"cveId": "CVE-2025-53971", "state": "PUBLISHED", "dateUpdated": "2025-08-21T14:51:19.669Z", "dateReserved": "2025-07-22T07:46:53.204Z", "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "datePublished": "2025-08-21T07:31:01.870Z", "assignerShortName": "Mattermost"}, "dataVersion": "5.1"}