CVE-2025-21088

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2025-21088", "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "state": "PUBLISHED", "assignerShortName": "Mattermost", "dateReserved": "2025-01-15T15:30:33.435Z", "datePublished": "2025-01-15T15:51:49.474Z", "dateUpdated": "2025-01-15T16:20:11.778Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "Mattermost", "vendor": "Mattermost", "versions": [{"status": "affected", "version": "10.2.0"}, {"lessThanOrEqual": "9.11.5", "status": "affected", "version": "9.11.0", "versionType": "semver"}, {"lessThanOrEqual": "10.0.3", "status": "affected", "version": "10.0.0", "versionType": "semver"}, {"lessThanOrEqual": "10.1.3", "status": "affected", "version": "10.1.0", "versionType": "semver"}, {"status": "unaffected", "version": "10.3.0"}, {"status": "unaffected", "version": "10.2.1"}, {"status": "unaffected", "version": "9.11.6"}, {"status": "unaffected", "version": "10.0.4"}, {"status": "unaffected", "version": "10.1.4"}]}], "credits": [{"lang": "en", "type": "finder", "value": "c0rydoras"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Mattermost versions 10.2.x &lt;= 10.2.0, 9.11.x &lt;= 9.11.5, 10.0.x &lt;= 10.0.3, 10.1.x &lt;= 10.1.3 fail to properly validate the style of proto supplied to an action's style in post.props.attachments, which allows an attacker to crash the frontend via crafted malicious input.<br></p>"}], "value": "Mattermost versions 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate the style of proto supplied to an action's style in post.props.attachments, which allows an attacker to crash the frontend via crafted malicious input."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-704", "description": "CWE-704: Incorrect Type Conversion or Cast", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "shortName": "Mattermost", "dateUpdated": "2025-01-15T15:51:49.474Z"}, "references": [{"url": "https://mattermost.com/security-updates"}], "solutions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Update Mattermost to versions 10.3.0, 2.23.0, 10.2.1, 9.11.6, 10.0.4, 10.1.4 or higher.</p>"}], "value": "Update Mattermost to versions 10.3.0, 2.23.0, 10.2.1, 9.11.6, 10.0.4, 10.1.4 or higher."}], "source": {"advisory": "MMSA-2024-00402", "defect": ["https://mattermost.atlassian.net/browse/MM-61709"], "discovery": "EXTERNAL"}, "title": "WebApp crash via improper validation of proto style in attachments", "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2025-01-15T16:19:00.477273Z", "id": "CVE-2025-21088", "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": "2025-01-15T16:20:11.778Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-21088", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-01-15T16:19:00.477273Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-01-15T16:19:05.431Z"}}], "cna": {"title": "WebApp crash via improper validation of proto style in attachments", "source": {"defect": ["https://mattermost.atlassian.net/browse/MM-61709"], "advisory": "MMSA-2024-00402", "discovery": "EXTERNAL"}, "credits": [{"lang": "en", "type": "finder", "value": "c0rydoras"}], "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "Mattermost", "product": "Mattermost", "versions": [{"status": "affected", "version": "10.2.0"}, {"status": "affected", "version": "9.11.0", "versionType": "semver", "lessThanOrEqual": "9.11.5"}, {"status": "affected", "version": "10.0.0", "versionType": "semver", "lessThanOrEqual": "10.0.3"}, {"status": "affected", "version": "10.1.0", "versionType": "semver", "lessThanOrEqual": "10.1.3"}, {"status": "unaffected", "version": "10.3.0"}, {"status": "unaffected", "version": "10.2.1"}, {"status": "unaffected", "version": "9.11.6"}, {"status": "unaffected", "version": "10.0.4"}, {"status": "unaffected", "version": "10.1.4"}], "defaultStatus": "unaffected"}], "solutions": [{"lang": "en", "value": "Update Mattermost to versions 10.3.0, 2.23.0, 10.2.1, 9.11.6, 10.0.4, 10.1.4 or higher.", "supportingMedia": [{"type": "text/html", "value": "<p>Update Mattermost to versions 10.3.0, 2.23.0, 10.2.1, 9.11.6, 10.0.4, 10.1.4 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 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate the style of proto supplied to an action's style in post.props.attachments, which allows an attacker to crash the frontend via crafted malicious input.", "supportingMedia": [{"type": "text/html", "value": "<p>Mattermost versions 10.2.x &lt;= 10.2.0, 9.11.x &lt;= 9.11.5, 10.0.x &lt;= 10.0.3, 10.1.x &lt;= 10.1.3 fail to properly validate the style of proto supplied to an action's style in post.props.attachments, which allows an attacker to crash the frontend via crafted malicious input.<br></p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-704", "description": "CWE-704: Incorrect Type Conversion or Cast"}]}], "providerMetadata": {"orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "shortName": "Mattermost", "dateUpdated": "2025-01-15T15:51:49.474Z"}}}, "cveMetadata": {"cveId": "CVE-2025-21088", "state": "PUBLISHED", "dateUpdated": "2025-01-15T16:20:11.778Z", "dateReserved": "2025-01-15T15:30:33.435Z", "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "datePublished": "2025-01-15T15:51:49.474Z", "assignerShortName": "Mattermost"}, "dataVersion": "5.1"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Mattermost", "vendor": "Mattermost", "versions": [{"status": "affected", "version": "10.2.0"}, {"lessThanOrEqual": "9.11.5", "status": "affected", "version": "9.11.0", "versionType": "semver"}, {"lessThanOrEqual": "10.0.3", "status": "affected", "version": "10.0.0", "versionType": "semver"}, {"lessThanOrEqual": "10.1.3", "status": "affected", "version": "10.1.0", "versionType": "semver"}, {"status": "unaffected", "version": "10.3.0"}, {"status": "unaffected", "version": "10.2.1"}, {"status": "unaffected", "version": "9.11.6"}, {"status": "unaffected", "version": "10.0.4"}, {"status": "unaffected", "version": "10.1.4"}]}], "source": "responsibledisclosure@mattermost.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "61B308B7-C55B-4250-BAA0-BF949DF9EA63", "versionEndExcluding": "9.11.6", "versionStartIncluding": "9.11.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "6470CB79-F54D-4FC3-ACF4-E38A5CD15782", "versionEndExcluding": "10.0.4", "versionStartIncluding": "10.0.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "C9D87A5B-2D40-446B-B9FB-4376B846432F", "versionEndExcluding": "10.1.4", "versionStartIncluding": "10.1.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:10.2.0:-:*:*:*:*:*:*", "matchCriteriaId": "DE143AEE-7950-4B0B-ABAE-4C3D29866F25", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Mattermost versions 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate the style of proto supplied to an action's style in post.props.attachments, which allows an attacker to crash the frontend via crafted malicious input."}, {"lang": "es", "value": "Las versiones de Mattermost 10.2.x &lt;= 10.2.0, 9.11.x &lt;= 9.11.5, 10.0.x &lt;= 10.0.3, 10.1.x &lt;= 10.1.3 no logran validar correctamente el estilo del proto suministrado al estilo de una acci\u00f3n en post.props.attachments, lo que permite que un atacante bloquee el frontend a trav\u00e9s de una entrada maliciosa manipulada."}], "id": "CVE-2025-21088", "lastModified": "2026-06-17T08:42:35.123", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "responsibledisclosure@mattermost.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-21088", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-01-15T16:19:00.477273Z", "version": "2.0.3"}}]}, "published": "2025-01-15T16:15:32.413", "references": [{"source": "responsibledisclosure@mattermost.com", "tags": ["Vendor Advisory"], "url": "https://mattermost.com/security-updates"}], "sourceIdentifier": "responsibledisclosure@mattermost.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-704"}], "source": "responsibledisclosure@mattermost.com", "type": "Secondary"}]}

{}

{"created": "2025-07-13T11:07:18.618711+00:00", "updated": "2025-07-13T11:07:18.618759+00:00", "vendors": ["mattermost", "mattermost$PRODUCT$mattermost"]}