175 lines
6.6 KiB
JSON
175 lines
6.6 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-9816",
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"assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
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"state": "PUBLISHED",
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"assignerShortName": "Mattermost",
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"dateReserved": "2026-05-28T09:54:00.723Z",
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"datePublished": "2026-08-17T22:05:24.910Z",
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"dateUpdated": "2026-08-18T15:26:07.011Z"
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},
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"containers": {
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"cna": {
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"affected": [
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{
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"defaultStatus": "unaffected",
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"product": "Mattermost",
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"vendor": "Mattermost",
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"versions": [
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{
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"lessThanOrEqual": "11.7.6",
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"status": "affected",
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"version": "11.7.0",
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"versionType": "semver"
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},
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{
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"lessThanOrEqual": "10.11.21",
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"status": "affected",
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"version": "10.11.0",
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"versionType": "semver"
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},
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{
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"lessThanOrEqual": "11.8.3",
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"status": "affected",
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"version": "11.8.0",
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"versionType": "semver"
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},
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{
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"version": "11.9.0",
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"status": "unaffected"
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},
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{
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"version": "11.7.7",
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"status": "unaffected"
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},
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{
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"version": "10.11.22",
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"status": "unaffected"
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},
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{
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"version": "11.8.4",
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"status": "unaffected"
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}
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]
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}
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],
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"credits": [
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{
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"lang": "en",
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"type": "finder",
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"value": "kamil-sawicki"
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}
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],
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"descriptions": [
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{
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"lang": "en",
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"value": "Mattermost versions 11.7.x <= 11.7.6, 10.11.x <= 10.11.21, 11.8.x <= 11.8.3 fail to validate BoardMember.Scheme* fields server-side on insert and archive-import paths which allows a board editor or non-guest team member to grant board admin to arbitrary users via POST /api/v2/boards/{boardID}/members and POST /api/v2/teams/{teamID}/archive/import.. Mattermost Advisory ID: MMSA-2026-00685"
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"attackVector": "NETWORK",
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"attackComplexity": "LOW",
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"privilegesRequired": "LOW",
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"userInteraction": "NONE",
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"scope": "UNCHANGED",
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"confidentialityImpact": "LOW",
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"integrityImpact": "HIGH",
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"availabilityImpact": "HIGH",
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H",
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"baseSeverity": "HIGH",
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"baseScore": 8.3
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},
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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]
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"description": "CWE-863: Incorrect Authorization",
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"cweId": "CWE-863"
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}
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]
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}
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],
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"references": [
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{
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"url": "https://mattermost.com/security-updates",
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"name": "MMSA-2026-00685",
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"tags": [
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"vendor-advisory"
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]
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}
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],
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"solutions": [
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{
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"value": "Update Mattermost to versions 11.9.0, 11.7.7, 10.11.22, 11.8.4 or higher.",
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"lang": "en"
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}
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],
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"source": {
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"advisory": "MMSA-2026-00685",
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"defect": [
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"https://mattermost.atlassian.net/browse/MM-69022"
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],
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"discovery": "EXTERNAL"
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},
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"title": "Insufficient server-side validation of board member role fields permits privilege escalation",
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"providerMetadata": {
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"orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
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"shortName": "Mattermost",
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"dateUpdated": "2026-08-17T22:05:24.910Z"
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},
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"x_generator": {
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"engine": "cvelib 1.8.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-08-18T15:23:50.527601Z",
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"id": "CVE-2026-9816",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-08-18T15:26:07.011Z"
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}
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}
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]
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}
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} |