Umbraco CMS Vulnerable to Stored XSS on Content Page Through Markdown Editor Preview Pane

{
  "id": "691d42339384c720f0e38bf7bcc800f4856d9d16cbfffdb07fce0f8a5475ff04",
  "url": "https://osv.dev/vulnerability/CVE-2024-35218",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Umbraco CMS Vulnerable to Stored XSS on Content Page Through Markdown Editor Preview Pane",
    "summary": "Umbraco CMS is an ASP.NET CMS used by more than 730.000 websites. Stored Cross-site scripting (XSS) enable attackers that have access to backoffice to bring malicious content into a website or application. This vulnerability has been patched in version(s) 8.18.13, 10.8.4, 12.3.7, 13.1.1 by implementing IHtmlSanitizer.",
    "evidence": "osv:CVE-2024-35218",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2024-35218",
      "aliases": [
        "CVE-2024-35218",
        "GHSA-gvpc-3pj6-4m9w"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/umbraco/umbraco-cms",
              "type": "GIT",
              "events": [
                {
                  "introduced": "b8db430615d76521a4394a23f9928dc7c12f87bd"
                },
                {
                  "fixed": "9700dc72668cac59b84d97349582be45bb471059"
                },
                {
                  "introduced": "e3f4b86f1c28e0ec30a1ad2a079e308af4cbfbf7"
                },
                {
                  "fixed": "cbf9f9bcd199d7ca0412be3071d275556f10b7ba"
                },
                {
                  "introduced": "ba724ed97d77b9951a22fe693f9dd3bdd000047c"
                },
                {
                  "fixed": "1b712fe6ec52aa4e71b3acf63e393c8e6ab85385"
                },
                {
                  "introduced": "9dfb3005bcd68f5399ee13263bfc462c69b39a66"
                },
                {
                  "fixed": "d090176272d07500dac0daee7c598aa8bb321050"
                },
                {
                  "fixed": "a2684069b1e9976444f60b4b37a80be05b87f6b6"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "8.0.0"
                      },
                      {
                        "fixed": "8.18.13"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "10.0.0"
                      },
                      {
                        "fixed": "10.8.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "12.0.0"
                      },
                      {
                        "fixed": "12.3.7"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "13.0.0"
                      },
                      {
                        "fixed": "13.1.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "1b712fe6ec52aa4e71b3acf63e393c8e6ab85385"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "a2684069b1e9976444f60b4b37a80be05b87f6b6"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "cbf9f9bcd199d7ca0412be3071d275556f10b7ba"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "d090176272d07500dac0daee7c598aa8bb321050"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-35218.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:46.085824673Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/35xxx/CVE-2024-35218.json",
        "https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-gvpc-3pj6-4m9w",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-35218",
        "https://github.com/umbraco/Umbraco-CMS/commit/1b712fe6ec52aa4e71b3acf63e393c8e6ab85385",
        "https://github.com/umbraco/Umbraco-CMS/commit/a2684069b1e9976444f60b4b37a80be05b87f6b6",
        "https://github.com/umbraco/Umbraco-CMS/commit/cbf9f9bcd199d7ca0412be3071d275556f10b7ba",
        "https://github.com/umbraco/Umbraco-CMS/commit/d090176272d07500dac0daee7c598aa8bb321050"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/35xxx/CVE-2024-35218.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-35218",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 514117,
  "published_at": "2024-05-21T13:42:27.26+00:00"
}