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CVE-2026-10527

🗓️ 17 Aug 2026 14:37:46Reported by MattermostType 
cve
 cve
🔗 web.nvd.nist.gov👁 10 Views

Mattermost retains Board Admin rights for demoted System Guests via unsynced SchemeAdmin flags.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
ATTACKERKB
CVE-2026-10527
17 Aug 202614:37
attackerkb
cvelist
Cvelist
CVE-2026-10527 Boards plugin retains Board Admin rights for users demoted to System Guest
17 Aug 202614:37
cvelist
euvd
EUVD
EUVD-2026-60192
17 Aug 202614:37
euvd
nvd
NVD
CVE-2026-10527
17 Aug 202615:16
nvd
ptsecurity
Positive Technologies
PT-2026-76667
17 Aug 202600:00
ptsecurity
vulnrichment
Vulnrichment
CVE-2026-10527 Boards plugin retains Board Admin rights for users demoted to System Guest
17 Aug 202614:37
vulnrichment
[
  {
    "defaultStatus": "unaffected",
    "product": "Mattermost",
    "vendor": "Mattermost",
    "versions": [
      {
        "lessThanOrEqual": "11.7.6",
        "status": "affected",
        "version": "11.7.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "10.11.21",
        "status": "affected",
        "version": "10.11.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "11.8.3",
        "status": "affected",
        "version": "11.8.0",
        "versionType": "semver"
      },
      {
        "version": "11.9.0",
        "status": "unaffected"
      },
      {
        "version": "11.7.7",
        "status": "unaffected"
      },
      {
        "version": "10.11.22",
        "status": "unaffected"
      },
      {
        "version": "11.8.4",
        "status": "unaffected"
      }
    ]
  }
]

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17 Aug 2026 16:16Current
5.3Medium risk
Vulners AI Score5.3
CVSS 3.16.3
SSVC
10