Security advisory

{
  "id": "35962e05b53383ebed50f072e128fe5e63bbbe56699e18559672c4311301cc6b",
  "url": "https://osv.dev/vulnerability/CVE-2021-39906",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-39906",
    "summary": "Improper validation of ipynb files in GitLab CE/EE version 13.5 and above allows an attacker to execute arbitrary JavaScript code on the victim's behalf.",
    "evidence": "osv:CVE-2021-39906",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-39906",
      "aliases": [
        "BIT-gitlab-2021-39906",
        "CVE-2021-39906"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://gitlab.com/gitlab-org/gitlab",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2f8ec2ebf58d8d4885127b9715b143e6756f2df1"
                },
                {
                  "fixed": "9ed95b96a6766af9336048a63a29b678f88a9413"
                },
                {
                  "introduced": "dec73e99fddac59c0bf816dc4bffd2a30abae6de"
                },
                {
                  "fixed": "3e776d83389c706fb81973736e57ca6a6fb952fc"
                },
                {
                  "introduced": "19c719febd74b6edf549bf6a2c0e36bf8f176d56"
                },
                {
                  "fixed": "abc23a14bace184532d1d344c4d230d9fc99eba6"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "13.5.0"
                      },
                      {
                        "fixed": "14.2.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "13.5.0"
                      },
                      {
                        "fixed": "14.2.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "14.3.0"
                      },
                      {
                        "fixed": "14.3.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "14.3.0"
                      },
                      {
                        "fixed": "14.3.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "14.4.0"
                      },
                      {
                        "fixed": "14.4.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "14.4.0"
                      },
                      {
                        "fixed": "14.4.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v14.3.2-ee",
            "v14.4.0-ee",
            "v14.3.3-ee",
            "v14.3.0-ee"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-39906.json"
          }
        }
      ],
      "modified": "2026-10-30T10:30:23.801980405Z",
      "provider": "osv",
      "references": [
        "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39906.json",
        "https://gitlab.com/gitlab-org/gitlab/-/issues/341566",
        "https://hackerone.com/reports/1347600"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-39906",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 430947,
  "published_at": "2021-11-05T00:15:10.977+00:00"
}