Ghost 6.20.0 before 6.57.1 Authentication Bypass via Session Handling

{
  "id": "2d0d7291eab0efc03b357d02f28203560af89b58a3bef081186b9a30d001675b",
  "url": "https://osv.dev/vulnerability/CVE-2026-103283",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Ghost 6.20.0 before 6.57.1 Authentication Bypass via Session Handling",
    "summary": "Ghost versions 6.20.0 before 6.57.1 contain a session handling vulnerability that allows authenticated staff users to log in as any other staff user with only the password, bypassing two-factor authentication. Attackers with valid staff credentials can exploit improper session management to impersonate other staff members and gain unauthorized access to administrative functions.",
    "evidence": "osv:CVE-2026-103283",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-103283",
      "aliases": [
        "BIT-ghost-2026-103283",
        "CVE-2026-103283",
        "GHSA-q55r-w7fh-rmh6"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/tryghost/ghost",
              "type": "GIT",
              "events": [
                {
                  "introduced": "9da77c9302b617707699b3e8fb69c586648a6580"
                },
                {
                  "fixed": "33d716a034a25824e9bd2fce8e2e394122421b41"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "6.20.0"
                      },
                      {
                        "fixed": "6.57.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "6.20.0"
                      },
                      {
                        "fixed": "6.57.1"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v6.57.0",
            "v6.56.0",
            "v6.55.0",
            "v6.54.1",
            "v6.54.0",
            "v6.53.0",
            "v6.52.1",
            "v6.52.0",
            "v6.51.0",
            "v6.50.0",
            "v6.49.0",
            "v6.48.0",
            "v6.47.0",
            "v6.46.0",
            "v6.45.0",
            "v6.44.1",
            "v6.44.0",
            "v6.43.1",
            "v6.43.0",
            "v6.42.0",
            "v6.41.1",
            "v6.41.0",
            "v6.40.0",
            "v6.39.0",
            "v6.38.0",
            "v6.37.1",
            "v6.37.0",
            "v6.36.0",
            "v6.35.0",
            "v6.34.0",
            "v6.33.0",
            "v6.32.0",
            "v6.31.0",
            "v6.30.0",
            "v6.29.1",
            "v6.29.0",
            "v6.28.0",
            "v6.27.0",
            "v6.26.0",
            "v6.25.1",
            "v6.25.0",
            "v6.24.0",
            "v6.23.0",
            "v6.22.1",
            "v6.22.0",
            "v6.21.0",
            "v6.21.2",
            "v6.21.1",
            "v6.20.1",
            "v6.20.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103283.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:28.160077976Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103283.json",
        "https://github.com/TryGhost/Ghost/security/advisories/GHSA-q55r-w7fh-rmh6",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-103283",
        "https://www.vulncheck.com/advisories/ghost-6.20.0-before-6.57.1-authentication-bypass-via-session-handling"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-613"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103283.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-103283",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 494751,
  "published_at": "2026-10-01T10:42:18.91+00:00"
}