Security advisory

{
  "id": "5263f105b138c5ae07e7267a4667cc86c3c80b83b46d7cc4453656a322f79f51",
  "url": "https://osv.dev/vulnerability/CVE-2021-4191",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-4191",
    "summary": "An issue has been discovered in GitLab CE/EE affecting versions 13.0 to 14.6.5, 14.7 to 14.7.4, and 14.8 to 14.8.2. Private GitLab instances with restricted sign-ups may be vulnerable to user enumeration to unauthenticated users through the GraphQL API.",
    "evidence": "osv:CVE-2021-4191",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-4191",
      "aliases": [
        "BIT-gitlab-2021-4191",
        "CVE-2021-4191"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://gitlab.com/gitlab-org/gitlab",
              "type": "GIT",
              "events": [
                {
                  "introduced": "ef3e35341f6a930af2d57979999b71457b9f72a4"
                },
                {
                  "fixed": "2ef3e89df350d5f8ffc802c04c5f19864249d125"
                },
                {
                  "introduced": "621e59848886e0dceec7a248ce6266450a7b5e21"
                },
                {
                  "fixed": "202c3007ccf93d8b338e10b49ef2c82e9d6f6bea"
                },
                {
                  "introduced": "1d7d0b0a1db4c69533330ab29c6c0d3bdb17adba"
                },
                {
                  "fixed": "20a7fdf52c92b0b26e328d9f55803af6e4baebe4"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "13.0.0"
                      },
                      {
                        "fixed": "14.6.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "13.0.0"
                      },
                      {
                        "fixed": "14.6.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "14.7.0"
                      },
                      {
                        "fixed": "14.7.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "14.7.0"
                      },
                      {
                        "fixed": "14.7.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "14.8"
                      },
                      {
                        "fixed": "14.8.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "14.8"
                      },
                      {
                        "fixed": "14.8.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v14.7.3-ee",
            "v14.8.1-ee",
            "v14.8.0-ee",
            "v14.7.2-ee",
            "v14.7.1-ee",
            "v14.7.0-ee"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-4191.json"
          }
        }
      ],
      "modified": "2026-10-30T10:30:49.623830717Z",
      "provider": "osv",
      "references": [
        "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4191.json",
        "https://gitlab.com/gitlab-org/gitlab/-/issues/343898",
        "https://hackerone.com/reports/1089609"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-4191",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 433322,
  "published_at": "2022-03-28T19:15:08.093+00:00"
}