{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:humhub:humhub:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.9.3"
              },
              {
                "introduced": "1.10.0"
              },
              {
                "fixed": "1.10.3"
              }
            ],
            "source": [
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6cf5a397a6b80e87e7b38a045475803a9f37496b"
            },
            {
              "introduced": "9441680ea372741a212741bfb70df4725bc8b04a"
            },
            {
              "fixed": "77052eb86baa4e264e102c53367529b506b864be"
            }
          ],
          "repo": "https://github.com/humhub/humhub",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-f5hc-5wfr-7v74"
  ],
  "database_specific": {},
  "details": "HumHub is an open-source social network kit written in PHP. Prior to HumHub version 1.10.3 or 1.9.3, it could be possible for registered users to become unauthorized members of private Spaces. Versions 1.10.3 and 1.9.3 contain a patch for this issue.",
  "id": "CVE-2021-43847",
  "modified": "2026-08-07T11:31:12.157374399Z",
  "published": "2021-12-20T22:15:08.003Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/humhub/humhub/releases/tag/v1.10.3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/humhub/humhub/releases/tag/v1.9.3"
    },
    {
      "type": "FIX",
      "url": "https://github.com/humhub/humhub/pull/5473"
    },
    {
      "type": "FIX",
      "url": "https://huntr.dev/bounties/943dad83-f0ed-4c74-ba81-7dfce7ca0ef2/"
    },
    {
      "type": "EVIDENCE",
      "url": "https://github.com/humhub/humhub/security/advisories/GHSA-f5hc-5wfr-7v74"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}