TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` injection

{
  "id": "04589f078434e5ab3a1bfd82c733929e82e297ce04829ebc31392ed34e4caa75",
  "url": "https://osv.dev/vulnerability/CVE-2026-47761",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` injection",
    "summary": "TinyMCE is an open source rich text editor. Prior to 5.11.1, 7.9.3, and 8.5.1, there is a stored XSS vulnerability in the media plugin. Attackers can inject malicious scripts via crafted data-mce-* attributes, which are executed when content is rendered. Impacts users of TinyMCE with the media plugin enabled. This vulnerability is fixed in 5.11.1, 7.9.3, and 8.5.1.",
    "evidence": "osv:CVE-2026-47761",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-47761",
      "aliases": [
        "CVE-2026-47761",
        "GHSA-vg35-5wq7-3x7w"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/tinymce/tinymce",
              "type": "GIT",
              "events": [
                {
                  "introduced": "4cc623897917472ba418f1378170727d7a94575b"
                },
                {
                  "fixed": "9dac5bb3c875b9c5de43a3f6ea33f55437e77325"
                },
                {
                  "introduced": "9f7ab4d2acef062e7f2cd85e7498e3016446ff65"
                },
                {
                  "fixed": "03573dd3ca7ac79f79b8f6e66f3b4256d3e1de36"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:tiny:tinymce:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "6.0.0"
                      },
                      {
                        "fixed": "7.9.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:tiny:tinymce:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "8.0.0"
                      },
                      {
                        "fixed": "8.5.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-47761.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.388766031Z",
      "provider": "osv",
      "references": [
        "https://www.tiny.cloud/docs/tinymce/7/7.9.3-release-notes/#overview",
        "https://www.tiny.cloud/docs/tinymce/8/8.5.1-release-notes/#overview",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47761.json",
        "https://github.com/tinymce/tinymce/security/advisories/GHSA-vg35-5wq7-3x7w",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-47761"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "GitHub_M",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "5.11.1"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47761.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-47761",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 518896,
  "published_at": "2026-05-28T15:20:57.814+00:00"
}