Security advisory

{
  "id": "0867037b0054496f2095dff9e4d12a8f1529195d7871885e44fec72bb6b28c12",
  "url": "https://osv.dev/vulnerability/CVE-2020-13300",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-13300",
    "summary": "GitLab CE/EE version 13.3 prior to 13.3.4 was vulnerable to an OAuth authorization scope change without user consent in the middle of the authorization flow.",
    "evidence": "osv:CVE-2020-13300",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2020-13300",
      "aliases": [
        "BIT-gitlab-2020-13300",
        "CVE-2020-13300"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://gitlab.com/gitlab-org/gitlab",
              "type": "GIT",
              "events": [
                {
                  "introduced": "4922d2720ace5802587b8324a77a41b373d08e69"
                },
                {
                  "fixed": "ad7bd7db4124d1f45168ecae80005a8385606809"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "13.3.0"
                      },
                      {
                        "fixed": "13.3.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "13.3.0"
                      },
                      {
                        "fixed": "13.3.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v13.3.2-ee",
            "v13.3.0-ee",
            "v13.3.1-ee"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-13300.json"
          }
        }
      ],
      "modified": "2026-10-30T10:30:47.344257618Z",
      "provider": "osv",
      "references": [
        "https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13300.json",
        "https://gitlab.com/gitlab-org/gitlab/-/issues/219931",
        "https://hackerone.com/reports/884766"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-13300",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 430211,
  "published_at": "2020-09-14T19:15:10.957+00:00"
}