Missing timestamp validation in Zoom webhook handler

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-3109",
    "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
    "assignerShortName": "Mattermost",
    "dateUpdated": "2026-03-26T19:52:11.107Z",
    "dateReserved": "2026-02-24T10:53:41.124Z",
    "datePublished": "2026-03-26T16:28:07.362Z",
    "state": "PUBLISHED"
  },
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        "shortName": "Mattermost",
        "dateUpdated": "2026-03-26T16:28:07.362Z"
      },
      "title": "Missing timestamp validation in Zoom webhook handler",
      "descriptions": [
        {
          "lang": "en",
          "value": "Mattermost Plugins versions <=11.4 10.11.11.0 fail to validate webhook request timestamps which allows an attacker to corrupt Zoom meeting state in Mattermost via replayed webhook requests. Mattermost Advisory ID: MMSA-2026-00584"
        }
      ],
      "affected": [
        {
          "vendor": "Mattermost",
          "product": "Mattermost",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "10.11.11"
            },
            {
              "version": "11.5.0",
              "status": "unaffected"
            },
            {
              "version": "10.11.12",
              "status": "unaffected"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-754: Improper Check for Unusual or Exceptional Conditions",
              "cweId": "CWE-754",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://mattermost.com/security-updates",
          "name": "MMSA-2026-00584",
          "tags": [
            "vendor-advisory"
          ]
        }
      ],
      "metrics": [
        {
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
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          "cvssV3_1": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L",
            "attackVector": "NETWORK",
            "attackComplexity": "HIGH",
            "privilegesRequired": "HIGH",
            "userInteraction": "NONE",
            "scope": "UNCHANGED",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "availabilityImpact": "LOW",
            "baseScore": 2.2,
            "baseSeverity": "LOW"
          }
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Update Mattermost Plugins to versions 11.5.0, 10.11.12 or higher."
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "thecybertantrik",
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          "dateUpdated": "2026-03-26T19:52:11.107Z"
        },
        "title": "CISA ADP Vulnrichment",
        "metrics": [
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  }
}