Security advisory

{
  "id": "828b3445cf362a6f7f1c74a756d1b6fb06bc61a236f5b6e2d84be0be3da76eb8",
  "url": "https://osv.dev/vulnerability/CVE-2021-22958",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-22958",
    "summary": "A Server-Side Request Forgery vulnerability was found in concrete5 < 8.5.5 that allowed a decimal notation encoded IP address to bypass the limitations in place for localhost allowing interaction with local services. Impact can vary depending on services exposed.CVSSv2.0 AV:A/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N",
    "evidence": "osv:CVE-2021-22958",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2021-22958",
      "aliases": [
        "CVE-2021-22958",
        "GHSA-284f-f2hw-j2gx"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/concretecms/concretecms",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "eb2e83dd9fc3f0eefa748ccc22bc4aed8ef85410"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "8.5.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "8.5.4",
            "8.5.3",
            "8.5.2",
            "8.5.1",
            "8.5.0",
            "8.4.5",
            "8.4.4",
            "8.4.3",
            "8.4.2",
            "8.4.1",
            "8.3.1",
            "8.2.1",
            "8.2.0",
            "8.2.0RC2",
            "8.1.0",
            "5.7.5.7",
            "5.7.5.6",
            "5.7.5.5",
            "5.7.5.2",
            "5.7.4.1",
            "5.7.3.1",
            "5.7.3",
            "5.7.2.1",
            "5.7.2",
            "5.7.0.4",
            "5.7.1",
            "5.7.0.3",
            "5.7.0.1",
            "5.7.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-22958.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:34.907169739Z",
      "provider": "osv",
      "references": [
        "https://documentation.concretecms.org/developers/introduction/version-history/855-release-notes",
        "https://hackerone.com/reports/863221"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-22958",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 433636,
  "published_at": "2021-10-07T14:15:08.107+00:00"
}