CVE-2025-12756 - Vulnerability Details - OpenCVE

Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate user permissions when deleting comments in Boards, which allows an authenticated user with the editor role to delete comments created by other users.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

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 Mattermost Boards

No data.

No data.

References

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

History

Tue, 02 Dec 2025 12:30:00 +0000

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

Mon, 01 Dec 2025 21:15:00 +0000

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

Mon, 01 Dec 2025 20:00:00 +0000

Type	Values Removed	Values Added
Description		Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate user permissions when deleting comments in Boards, which allows an authenticated user with the editor role to delete comments created by other users.
Title		Insecure Direct Object Reference in Mattermost Boards Plugin Enables Unauthorised Comment Deletion
Weaknesses		CWE-863
References		https://mattermost.com/security-updates
Metrics		cvssV3_1 `{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'}`

MITRE

Status: PUBLISHED

Assigner: Mattermost

Published: 2025-12-01T19:51:46.289Z

Updated: 2025-12-01T20:02:24.869Z

Reserved: 2025-11-05T15:23:20.065Z

Link: CVE-2025-12756

Vulnrichment

Updated: 2025-12-01T20:02:15.643Z

NVD

Status : Awaiting Analysis

Published: 2025-12-01T20:15:49.147

Modified: 2025-12-02T17:16:29.163

Link: CVE-2025-12756

Redhat

No data.

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-12756", "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "state": "PUBLISHED", "assignerShortName": "Mattermost", "dateReserved": "2025-11-05T15:23:20.065Z", "datePublished": "2025-12-01T19:51:46.289Z", "dateUpdated": "2025-12-01T20:02:24.869Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "Mattermost", "vendor": "Mattermost", "versions": [{"lessThanOrEqual": "11.0.2", "status": "affected", "version": "11.0.0", "versionType": "semver"}, {"lessThanOrEqual": "10.12.1", "status": "affected", "version": "10.12.0", "versionType": "semver"}, {"lessThanOrEqual": "10.11.4", "status": "affected", "version": "10.11.0", "versionType": "semver"}, {"lessThanOrEqual": "10.5.12", "status": "affected", "version": "10.5.0", "versionType": "semver"}, {"version": "11.1.0", "status": "unaffected"}, {"version": "11.0.3", "status": "unaffected"}, {"version": "10.12.2", "status": "unaffected"}, {"version": "10.11.5", "status": "unaffected"}, {"version": "10.5.13", "status": "unaffected"}]}], "credits": [{"lang": "en", "type": "finder", "value": "daynight"}], "descriptions": [{"lang": "en", "value": "Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate user permissions when deleting comments in Boards, which allows an authenticated user with the editor role to delete comments created by other users."}], "metrics": [{"cvssV3_1": {"attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE", "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "baseSeverity": "MEDIUM", "baseScore": 4.3}, "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 11.1.0, 11.0.3, 10.12.2, 10.11.5, 10.5.13 or higher.", "lang": "en"}], "source": {"advisory": "MMSA-2025-00530", "defect": ["https://mattermost.atlassian.net/browse/MM-65965"], "discovery": "EXTERNAL"}, "title": "Insecure Direct Object Reference in Mattermost Boards Plugin Enables Unauthorised Comment Deletion", "providerMetadata": {"orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "shortName": "Mattermost", "dateUpdated": "2025-12-01T19:51:46.289Z"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2025-12-01T20:01:59.250891Z", "id": "CVE-2025-12756", "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": "2025-12-01T20:02:24.869Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-12756", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-12-01T20:01:59.250891Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-12-01T20:02:15.643Z"}}], "cna": {"title": "Insecure Direct Object Reference in Mattermost Boards Plugin Enables Unauthorised Comment Deletion", "source": {"defect": ["https://mattermost.atlassian.net/browse/MM-65965"], "advisory": "MMSA-2025-00530", "discovery": "EXTERNAL"}, "credits": [{"lang": "en", "type": "finder", "value": "daynight"}], "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "Mattermost", "product": "Mattermost", "versions": [{"status": "affected", "version": "11.0.0", "versionType": "semver", "lessThanOrEqual": "11.0.2"}, {"status": "affected", "version": "10.12.0", "versionType": "semver", "lessThanOrEqual": "10.12.1"}, {"status": "affected", "version": "10.11.0", "versionType": "semver", "lessThanOrEqual": "10.11.4"}, {"status": "affected", "version": "10.5.0", "versionType": "semver", "lessThanOrEqual": "10.5.12"}, {"status": "unaffected", "version": "11.1.0"}, {"status": "unaffected", "version": "11.0.3"}, {"status": "unaffected", "version": "10.12.2"}, {"status": "unaffected", "version": "10.11.5"}, {"status": "unaffected", "version": "10.5.13"}], "defaultStatus": "unaffected"}], "solutions": [{"lang": "en", "value": "Update Mattermost to versions 11.1.0, 11.0.3, 10.12.2, 10.11.5, 10.5.13 or higher."}], "references": [{"url": "https://mattermost.com/security-updates"}], "descriptions": [{"lang": "en", "value": "Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate user permissions when deleting comments in Boards, which allows an authenticated user with the editor role to delete comments created by other users."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-863", "description": "CWE-863: Incorrect Authorization"}]}], "providerMetadata": {"orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "shortName": "Mattermost", "dateUpdated": "2025-12-01T19:51:46.289Z"}}}, "cveMetadata": {"cveId": "CVE-2025-12756", "state": "PUBLISHED", "dateUpdated": "2025-12-01T20:02:24.869Z", "dateReserved": "2025-11-05T15:23:20.065Z", "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "datePublished": "2025-12-01T19:51:46.289Z", "assignerShortName": "Mattermost"}, "dataVersion": "5.2"}