{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:bigbluebutton:bigbluebutton:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.2.29"
              }
            ],
            "source": [
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "18b75285714bc2eca7a58a0611ff3af267cbd4c7"
            },
            {
              "fixed": "d2cb02b3bd670265c6b1ba003f87fc261e0ac3e1"
            }
          ],
          "repo": "https://github.com/bigbluebutton/bigbluebutton",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {},
  "details": "In BigBlueButton before 2.2.29, a user can vote more than once in a single poll.",
  "id": "CVE-2020-28953",
  "modified": "2026-08-07T11:31:10.593701810Z",
  "published": "2020-11-19T22:15:13.677Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/bigbluebutton/bigbluebutton/compare/v2.2.28...v2.2.29"
    },
    {
      "type": "FIX",
      "url": "https://github.com/bigbluebutton/bigbluebutton/commit/d2cb02b3bd670265c6b1ba003f87fc261e0ac3e1"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}