TinyMCE Cross-Site Scripting (XSS) vulnerability using through data-mce- prefixed src, href, style attributes

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-47759",
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "dateUpdated": "2026-05-28T15:20:11.242Z",
    "dateReserved": "2026-05-19T22:36:16.881Z",
    "datePublished": "2026-05-28T15:20:11.242Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M",
        "dateUpdated": "2026-05-28T15:20:11.242Z"
      },
      "title": "TinyMCE Cross-Site Scripting (XSS) vulnerability using through data-mce- prefixed src, href, style attributes",
      "descriptions": [
        {
          "lang": "en",
          "value": "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 via unsanitized data-mce-* attributes (data-mce-href, data-mce-src, data-mce-style). Allows attackers to inject malicious values that override safe attributes during serialization, bypassing validation. This vulnerability is fixed in 5.11.1, 7.9.3, and 8.5.1."
        }
      ],
      "affected": [
        {
          "vendor": "tinymce",
          "product": "tinymce",
          "versions": [
            {
              "version": "< 5.11.1",
              "status": "affected"
            },
            {
              "version": ">= 6.0.0, <= 6.8.6",
              "status": "affected"
            },
            {
              "version": ">= 7.0.0, < 7.9.3",
              "status": "affected"
            },
            {
              "version": ">= 8.0.0, < 8.5.1",
              "status": "affected"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
              "cweId": "CWE-79",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://github.com/tinymce/tinymce/security/advisories/GHSA-q742-qvgc-gc2f",
          "name": "https://github.com/tinymce/tinymce/security/advisories/GHSA-q742-qvgc-gc2f",
          "tags": [
            "x_refsource_CONFIRM"
          ]
        },
        {
          "url": "https://www.tiny.cloud/docs/tinymce/7/7.9.3-release-notes/#overview",
          "name": "https://www.tiny.cloud/docs/tinymce/7/7.9.3-release-notes/#overview",
          "tags": [
            "x_refsource_MISC"
          ]
        },
        {
          "url": "https://www.tiny.cloud/docs/tinymce/8/8.5.1-release-notes/#overview",
          "name": "https://www.tiny.cloud/docs/tinymce/8/8.5.1-release-notes/#overview",
          "tags": [
            "x_refsource_MISC"
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N",
            "attackVector": "NETWORK",
            "attackComplexity": "LOW",
            "privilegesRequired": "LOW",
            "userInteraction": "REQUIRED",
            "scope": "CHANGED",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "availabilityImpact": "NONE",
            "baseScore": 8.7,
            "baseSeverity": "HIGH"
          }
        }
      ]
    }
  }
}