Security advisory

{
  "id": "eac77ae61947742b2a7ca2284fe8a33e3fa3666113866d60c8c0f0f922c735c2",
  "url": "https://osv.dev/vulnerability/CVE-2018-19787",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-19787",
    "summary": "An issue was discovered in lxml before 4.2.5. lxml/html/clean.py in the lxml.html.clean module does not remove javascript: URLs that use escaping, allowing a remote attacker to conduct XSS attacks, as demonstrated by \"j a v a s c r i p t:\" in Internet Explorer. This is a similar issue to CVE-2014-3146.",
    "evidence": "osv:CVE-2018-19787",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2018-19787",
      "aliases": [
        "CVE-2018-19787",
        "GHSA-xp26-p53h-6h2p",
        "PYSEC-2018-12"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/lxml/lxml",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1dee355e83b1f524de7a772a8da941a186036bc2"
                },
                {
                  "fixed": "6be1d081b49c97cfd7b3fbd934a193b668629109"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:lxml:lxml:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.2.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "6be1d081b49c97cfd7b3fbd934a193b668629109"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "lxml-4.2.4",
            "lxml-4.2.3-win",
            "lxml-4.2.3",
            "lxml-4.2.2",
            "lxml-4.2.1",
            "lxml-4.2.0",
            "lxml-4.1.1",
            "lxml-4.1.0",
            "lxml-4.0.0",
            "lxml-3.8.0-py27fix",
            "lxml-3.8.0",
            "lxml-3.7.2",
            "lxml-3.7.1",
            "lxml-3.7.0",
            "lxml-3.6.1",
            "lxml-3.6.0",
            "lxml-3.5.0",
            "lxml-3.5.0b1",
            "lxml-3.4.1",
            "lxml-3.4.0",
            "lxml-3.4.0beta1",
            "lxml-3.3.3",
            "lxml-3.3.2",
            "lxml-3.3.1",
            "lxml-3.3.0",
            "lxml-3.3.0beta5",
            "lxml-3.3.0beta4",
            "lxml-3.3.0beta3",
            "lxml-3.3.0beta2",
            "lxml-3.3.0beta1",
            "lxml-3.2.3",
            "lxml-3.2.2",
            "lxml-3.2.1",
            "lxml-3.2.0",
            "lxml-3.1.1",
            "lxml-3.1.0",
            "lxml-3.1beta1",
            "lxml-3.0.1",
            "lxml-3.0",
            "lxml-3.0beta1",
            "lxml-3.0alpha2",
            "lxml-3.0alpha1",
            "lxml-2.3.1",
            "lxml-2.3",
            "lxml-2.3beta1",
            "lxml-2.3alpha2",
            "lxml-2.3alpha1",
            "lxml-2.2.2",
            "lxml-2.2.1",
            "lxml-2.2",
            "lxml-2.1",
            "lxml-2.1beta3",
            "lxml-2.1beta2",
            "lxml-2.1beta1",
            "lxml-2.1alpha1",
            "lxml-2.0.1",
            "lxml-2.0",
            "lxml-2.0beta2",
            "lxml-2.0beta1",
            "lxml-2.0alpha6",
            "lxml-2.0alpha5",
            "lxml-2.0alpha4",
            "lxml-2.0alpha3",
            "lxml-2.0alpha2",
            "lxml-2.0alpha1",
            "lxml-1.2",
            "lxml-1.1",
            "lxml-1.1beta",
            "lxml-1.1alpha",
            "lxml-1.0",
            "lxml-1.0.beta",
            "lxml-0.9",
            "lxml-0.7",
            "lxml-0.6",
            "lxml-0.5.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-19787.json"
          }
        }
      ],
      "modified": "2026-10-20T10:51:34.750408673Z",
      "provider": "osv",
      "references": [
        "https://lists.debian.org/debian-lts-announce/2020/11/msg00044.html",
        "https://lists.debian.org/debian-lts-announce/2018/12/msg00001.html",
        "https://usn.ubuntu.com/3841-1/",
        "https://usn.ubuntu.com/3841-2/",
        "https://github.com/lxml/lxml/commit/6be1d081b49c97cfd7b3fbd934a193b668629109"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*",
              "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
              "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*",
              "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*"
            ],
            "vendor_product": "canonical:ubuntu_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "12.04"
                  },
                  {
                    "last_affected": "12.04"
                  },
                  {
                    "introduced": "14.04"
                  },
                  {
                    "last_affected": "14.04"
                  },
                  {
                    "introduced": "16.04"
                  },
                  {
                    "last_affected": "16.04"
                  },
                  {
                    "introduced": "18.04"
                  },
                  {
                    "last_affected": "18.04"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "8.0"
                  },
                  {
                    "last_affected": "8.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2018-19787",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 382593,
  "published_at": "2018-12-02T10:29:00.227+00:00"
}