Security advisory

{
  "id": "027f9aa78035b0bd83e68846049596e71fa618d717cba5fedba506faf760f28f",
  "url": "https://osv.dev/vulnerability/CVE-2019-10010",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-10010",
    "summary": "Cross-site scripting (XSS) vulnerability in the PHP League CommonMark library before 0.18.3 allows remote attackers to insert unsafe links into HTML by using double-encoded HTML entities that are not properly escaped during rendering, a different vulnerability than CVE-2018-20583.",
    "evidence": "osv:CVE-2019-10010",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2019-10010",
      "aliases": [
        "CVE-2019-10010",
        "GHSA-3v43-877x-qgmq"
      ],
      "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/thephpleague/commonmark",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "b1ec41ce15c3bd6f7cbe86a645b3efc78d927446"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:thephpleague:commonmark:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.18.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "b1ec41ce15c3bd6f7cbe86a645b3efc78d927446"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "0.18.3"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.18.1",
            "0.17.4",
            "0.17.2",
            "0.17.0",
            "0.16.0",
            "0.15.7",
            "0.15.6",
            "0.15.5",
            "0.15.4",
            "0.15.3",
            "0.15.2",
            "0.15.1",
            "0.15.0",
            "0.14.0",
            "0.13.4",
            "0.13.3",
            "0.13.2",
            "0.13.1",
            "0.13.0",
            "0.12.0",
            "0.11.3",
            "0.11.2",
            "0.11.1",
            "0.11.0",
            "0.10.0",
            "0.9.0",
            "0.8.0",
            "0.7.1",
            "0.7.0",
            "0.6.1",
            "0.6.0",
            "0.5.1",
            "0.5.0",
            "0.4.0",
            "0.3.0",
            "0.2.1",
            "0.2.0",
            "0.1.2",
            "0.1.1",
            "0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-10010.json"
          }
        }
      ],
      "modified": "2026-10-20T10:50:33.939221023Z",
      "provider": "osv",
      "references": [
        "https://github.com/thephpleague/commonmark/releases/tag/0.18.3",
        "https://github.com/thephpleague/commonmark/issues/353"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2019-10010",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 381857,
  "published_at": "2019-03-24T18:29:00.27+00:00"
}