CVE-2026-47761: Tinymce Cross-Site Scripting Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-vg35-5wq7-3x7w",
  "modified" : "2026-06-30T21:11:55Z",
  "published" : "2026-06-05T20:29:43Z",
  "aliases" : [ "CVE-2026-47761" ],
  "summary" : "TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` injection",
  "details" : "### Impact\nStored 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.\n\n### Patches\nThis vulnerability has been patched in TinyMCE 8.5.1, TinyMCE 7.9.3 and TinyMCE 5.11.1 LTS by ensuring that, when using the media plugin, any content with `data-mce-object` and `data-mce-p-*` attributes are properly sanitized.\n\n### Workarounds\nNo official workaround available.\n\n### Fix\nTo avoid this vulnerability:\n\n- Upgrade to TinyMCE 8.5.1 or higher.\n- Upgrade to TinyMCE 7.9.3 or higher.\n- Upgrade to TinyMCE 5.11.1 LTS or higher for TinyMCE 5.x (only available as part of commercial [long-term support](https://www.tiny.cloud/long-term-support/) contract).\n\n### Acknowledgements\nTiny thanks [Aymane MAZGUITI](https://github.com/UncleJ4ck) and [Ange Primiterra](https://github.com/ange-primiterra) for their help identifying this vulnerability.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "tinymce"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "5.10.9"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "tinymce"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "6.0.0"
      }, {
        "fixed" : "7.9.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "tinymce"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.0.0"
      }, {
        "fixed" : "8.5.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "TinyMCE"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "5.10.9"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "TinyMCE"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "6.0.0"
      }, {
        "fixed" : "7.9.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "TinyMCE"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.0.0"
      }, {
        "fixed" : "8.5.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "tinymce/tinymce"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "5.10.9"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "tinymce/tinymce"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "6.0.0"
      }, {
        "fixed" : "7.9.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "tinymce/tinymce"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.0.0"
      }, {
        "fixed" : "8.5.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/tinymce/tinymce/security/advisories/GHSA-vg35-5wq7-3x7w"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-47761"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/tinymce/tinymce"
  }, {
    "type" : "WEB",
    "url" : "https://www.tiny.cloud/docs/tinymce/7/7.9.3-release-notes/#overview"
  }, {
    "type" : "WEB",
    "url" : "https://www.tiny.cloud/docs/tinymce/8/8.5.1-release-notes/#overview"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-05T20:29:43Z",
    "nvd_published_at" : "2026-05-28T16:16:28Z"
  }
}