Security advisory

{
  "id": "d9420ea37070ffeda14b0967189d3cc8b21bc0b5593dc11cdc17422bf5adb742",
  "url": "https://osv.dev/vulnerability/CVE-2018-20491",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-20491",
    "summary": "An issue was discovered in GitLab Enterprise Edition 11.3.x and 11.4.x before 11.4.13, 11.5.x before 11.5.6, and 11.6.x before 11.6.1. It allows XSS.",
    "evidence": "osv:CVE-2018-20491",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2018-20491",
      "aliases": [
        "CVE-2018-20491"
      ],
      "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": "1bbe39452664021af90851aef8527ce5e850343e"
                },
                {
                  "fixed": "c161d18cc315d377506b802e05c7f9478ddf9bbb"
                },
                {
                  "introduced": "cb71fca38c3de0c212685f97a46ee8426f63d301"
                },
                {
                  "fixed": "bc7cf5144c6f8b9bf3cfb66f32583b896343dac7"
                },
                {
                  "introduced": "4c09765c6424a96be7c7ae7707db3bda4e9c4ab4"
                },
                {
                  "fixed": "397651c6d6519c1cbff8bd204b1839980ef2fc20"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "11.3.0"
                      },
                      {
                        "fixed": "11.4.13"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "11.3.0"
                      },
                      {
                        "fixed": "11.4.13"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "11.5.0"
                      },
                      {
                        "fixed": "11.5.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "11.5.0"
                      },
                      {
                        "fixed": "11.5.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "11.6.0"
                      },
                      {
                        "fixed": "11.6.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "11.6.0"
                      },
                      {
                        "fixed": "11.6.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v11.6.0-ee",
            "v11.5.5-ee",
            "v11.5.4-ee",
            "v11.5.3-ee",
            "v11.5.2-ee",
            "v11.5.1-ee",
            "v11.5.0-ee"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20491.json"
          }
        }
      ],
      "modified": "2026-10-30T10:30:15.931530479Z",
      "provider": "osv",
      "references": [
        "https://about.gitlab.com/2018/12/31/security-release-gitlab-11-dot-6-dot-1-released/",
        "https://gitlab.com/gitlab-org/gitlab-ce/issues/54008"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-20491",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 439997,
  "published_at": "2019-12-30T22:15:11.73+00:00"
}