Security advisory

{
  "id": "16ba0f830406ec009326e368062af0f791605f595e9512647681e0a83c189218",
  "url": "https://osv.dev/vulnerability/CVE-2020-13346",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-13346",
    "summary": "Membership changes are not reflected in ToDo subscriptions in GitLab versions prior to 13.2.10, 13.3.7 and 13.4.2, allowing guest users to access confidential issues through API.",
    "evidence": "osv:CVE-2020-13346",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-13346",
      "aliases": [
        "BIT-gitlab-2020-13346",
        "CVE-2020-13346"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://gitlab.com/gitlab-org/gitlab",
              "type": "GIT",
              "events": [
                {
                  "introduced": "44dbeccbe1039cb1d42d8502655ffb0bce3ae803"
                },
                {
                  "fixed": "8cd5b450a0f100a1e80a3ceceb85282e98b5a5ca"
                },
                {
                  "introduced": "4922d2720ace5802587b8324a77a41b373d08e69"
                },
                {
                  "fixed": "34d591d79d0325cd9c6669fde99dba7cc82b9e43"
                },
                {
                  "introduced": "e70802d39ca8751d0f167d736a34a39c1dc695bc"
                },
                {
                  "fixed": "34869f45ee85df86bf0c41b26d21b77943e16376"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "11.2.0"
                      },
                      {
                        "fixed": "13.2.10"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "11.2.0"
                      },
                      {
                        "fixed": "13.2.10"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "13.3.0"
                      },
                      {
                        "fixed": "13.3.7"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "13.3.0"
                      },
                      {
                        "fixed": "13.3.7"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "13.4.0"
                      },
                      {
                        "fixed": "13.4.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "13.4.0"
                      },
                      {
                        "fixed": "13.4.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v13.4.1-ee",
            "v13.4.0-ee",
            "v13.3.6-ee",
            "v13.3.5-ee",
            "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-2020-13346.json"
          }
        }
      ],
      "modified": "2026-10-30T10:31:06.037599376Z",
      "provider": "osv",
      "references": [
        "https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13346.json",
        "https://gitlab.com/gitlab-org/gitlab/-/issues/219496",
        "https://hackerone.com/reports/880863"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-13346",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 440546,
  "published_at": "2020-10-07T14:15:11.747+00:00"
}