CVE-2025-8402 - Vulnerability Details - OpenCVE

Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.0, 10.9.x <= 10.9.3 fail to validate import data which allows a system admin to crash the server via the bulk import feature.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

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

Sat, 23 Aug 2025 11:00:00 +0000

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

Thu, 21 Aug 2025 18:15:00 +0000

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

Thu, 21 Aug 2025 17:15:00 +0000

Type	Values Removed	Values Added
Description		Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.0, 10.9.x <= 10.9.3 fail to validate import data which allows a system admin to crash the server via the bulk import feature.
Title		Nil pointer dereference in bulk import crashes server
Weaknesses		CWE-1287 CWE-476
References		https://mattermost.com/security-updates
Metrics		cvssV3_1 `{'score': 4.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'}`

MITRE

Status: PUBLISHED

Assigner: Mattermost

Published: 2025-08-21T17:01:43.420Z

Updated: 2025-08-21T17:30:38.422Z

Reserved: 2025-07-31T00:31:47.312Z

Link: CVE-2025-8402

Vulnrichment

Updated: 2025-08-21T17:20:46.523Z

NVD

Status : Awaiting Analysis

Published: 2025-08-21T17:15:33.093

Modified: 2025-08-22T18:08:51.663

Link: CVE-2025-8402

Redhat

No data.

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2025-8402", "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "state": "PUBLISHED", "assignerShortName": "Mattermost", "dateReserved": "2025-07-31T00:31:47.312Z", "datePublished": "2025-08-21T17:01:43.420Z", "dateUpdated": "2025-08-21T17:30:38.422Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "Mattermost", "vendor": "Mattermost", "versions": [{"lessThanOrEqual": "10.8.3", "status": "affected", "version": "10.8.0", "versionType": "semver"}, {"lessThanOrEqual": "10.5.8", "status": "affected", "version": "10.5.0", "versionType": "semver"}, {"lessThanOrEqual": "9.11.17", "status": "affected", "version": "9.11.0", "versionType": "semver"}, {"status": "affected", "version": "10.10.0", "versionType": "semver"}, {"lessThanOrEqual": "10.9.3", "status": "affected", "version": "10.9.0", "versionType": "semver"}, {"status": "unaffected", "version": "10.11.0"}, {"status": "unaffected", "version": "10.8.4"}, {"status": "unaffected", "version": "10.5.9"}, {"status": "unaffected", "version": "9.11.18"}, {"status": "unaffected", "version": "10.10.1"}, {"status": "unaffected", "version": "10.9.4"}]}], "credits": [{"lang": "en", "type": "finder", "value": "daw10"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.0, 10.9.x <= 10.9.3 fail to validate import data which allows a system admin to crash the server via the bulk import feature.</p>"}], "value": "Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.0, 10.9.x <= 10.9.3 fail to validate import data which allows a system admin to crash the server via the bulk import feature."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 4.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-1287", "description": "CWE-1287: Improper Validation of Specified Type of Input", "lang": "en", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-476", "description": "CWE-476: NULL Pointer Dereference", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "shortName": "Mattermost", "dateUpdated": "2025-08-21T17:01:43.420Z"}, "references": [{"url": "https://mattermost.com/security-updates"}], "solutions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Update Mattermost to versions 10.11.0, 10.8.4, 10.5.9, 9.11.18, 10.10.1, 10.9.4 or higher.</p>"}], "value": "Update Mattermost to versions 10.11.0, 10.8.4, 10.5.9, 9.11.18, 10.10.1, 10.9.4 or higher."}], "source": {"advisory": "MMSA-2025-00506", "defect": ["https://mattermost.atlassian.net/browse/MM-64717"], "discovery": "EXTERNAL"}, "title": "Nil pointer dereference in bulk import crashes server", "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2025-08-21T17:20:44.403747Z", "id": "CVE-2025-8402", "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": "2025-08-21T17:30:38.422Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-8402", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-08-21T17:20:44.403747Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-08-21T17:20:46.523Z"}}], "cna": {"title": "Nil pointer dereference in bulk import crashes server", "source": {"defect": ["https://mattermost.atlassian.net/browse/MM-64717"], "advisory": "MMSA-2025-00506", "discovery": "EXTERNAL"}, "credits": [{"lang": "en", "type": "finder", "value": "daw10"}], "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.9, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "NONE"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "Mattermost", "product": "Mattermost", "versions": [{"status": "affected", "version": "10.8.0", "versionType": "semver", "lessThanOrEqual": "10.8.3"}, {"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": "affected", "version": "10.10.0", "versionType": "semver"}, {"status": "affected", "version": "10.9.0", "versionType": "semver", "lessThanOrEqual": "10.9.3"}, {"status": "unaffected", "version": "10.11.0"}, {"status": "unaffected", "version": "10.8.4"}, {"status": "unaffected", "version": "10.5.9"}, {"status": "unaffected", "version": "9.11.18"}, {"status": "unaffected", "version": "10.10.1"}, {"status": "unaffected", "version": "10.9.4"}], "defaultStatus": "unaffected"}], "solutions": [{"lang": "en", "value": "Update Mattermost to versions 10.11.0, 10.8.4, 10.5.9, 9.11.18, 10.10.1, 10.9.4 or higher.", "supportingMedia": [{"type": "text/html", "value": "<p>Update Mattermost to versions 10.11.0, 10.8.4, 10.5.9, 9.11.18, 10.10.1, 10.9.4 or higher.</p>", "base64": false}]}], "references": [{"url": "https://mattermost.com/security-updates"}], "x_generator": {"engine": "Vulnogram 0.2.0"}, "descriptions": [{"lang": "en", "value": "Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.0, 10.9.x <= 10.9.3 fail to validate import data which allows a system admin to crash the server via the bulk import feature.", "supportingMedia": [{"type": "text/html", "value": "<p>Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.0, 10.9.x <= 10.9.3 fail to validate import data which allows a system admin to crash the server via the bulk import feature.</p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-1287", "description": "CWE-1287: Improper Validation of Specified Type of Input"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-476", "description": "CWE-476: NULL Pointer Dereference"}]}], "providerMetadata": {"orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "shortName": "Mattermost", "dateUpdated": "2025-08-21T17:01:43.420Z"}}}, "cveMetadata": {"cveId": "CVE-2025-8402", "state": "PUBLISHED", "dateUpdated": "2025-08-21T17:30:38.422Z", "dateReserved": "2025-07-31T00:31:47.312Z", "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "datePublished": "2025-08-21T17:01:43.420Z", "assignerShortName": "Mattermost"}, "dataVersion": "5.1"}