Security advisory

{
  "id": "dc0708ff8e53c4b1b4811f0ce64a54dcf9fa70f5e86ff0b4359583ada3906707",
  "url": "https://osv.dev/vulnerability/CVE-2021-39946",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-39946",
    "summary": "Improper neutralization of user input in GitLab CE/EE versions 14.3 to 14.3.6, 14.4 to 14.4.4, and 14.5 to 14.5.2 allowed an attacker to exploit XSS by abusing the generation of the HTML code related to emojis",
    "evidence": "osv:CVE-2021-39946",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-39946",
      "aliases": [
        "BIT-gitlab-2021-39946",
        "CVE-2021-39946"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://gitlab.com/gitlab-org/gitlab",
              "type": "GIT",
              "events": [
                {
                  "introduced": "dec73e99fddac59c0bf816dc4bffd2a30abae6de"
                },
                {
                  "fixed": "057790c613dea428aa523357c333ced5433794ee"
                },
                {
                  "introduced": "19c719febd74b6edf549bf6a2c0e36bf8f176d56"
                },
                {
                  "fixed": "a1175384df48e74899d664520601823016d81084"
                },
                {
                  "introduced": "490a8efda84a04e31ac41b882d95bb717c202437"
                },
                {
                  "fixed": "4511944420f00a68d5df2b3d81e5dae7fa2888f3"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "14.3"
                      },
                      {
                        "fixed": "14.3.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "14.3"
                      },
                      {
                        "fixed": "14.3.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "14.4"
                      },
                      {
                        "fixed": "14.4.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "14.4"
                      },
                      {
                        "fixed": "14.4.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "14.5"
                      },
                      {
                        "fixed": "14.5.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "14.5"
                      },
                      {
                        "fixed": "14.5.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v14.5.1-ee",
            "v14.4.3-ee",
            "v14.3.5-ee",
            "v14.3.2-ee",
            "v14.5.0-ee",
            "v14.4.2-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-2021-39946.json"
          }
        }
      ],
      "modified": "2026-10-30T10:30:22.929052447Z",
      "provider": "osv",
      "references": [
        "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39946.json",
        "https://gitlab.com/gitlab-org/gitlab/-/issues/345657",
        "https://hackerone.com/reports/1398305"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-39946",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 431565,
  "published_at": "2022-01-18T17:15:08.777+00:00"
}