TinyMCE Cross-Site Scripting (XSS) vulnerability through `mce:protected` comments

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-47762",
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "dateUpdated": "2026-05-28T15:21:36.882Z",
    "dateReserved": "2026-05-19T22:36:16.881Z",
    "datePublished": "2026-05-28T15:21:36.882Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M",
        "dateUpdated": "2026-05-28T15:21:36.882Z"
      },
      "title": "TinyMCE Cross-Site Scripting (XSS) vulnerability through `mce:protected` comments",
      "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 forged mce:protected comments. Allows attackers to bypass sanitization and inject scripts that execute when content is restored. Impacts users who utilize the protect option. 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-v98h-vmpc-fpqv",
          "name": "https://github.com/tinymce/tinymce/security/advisories/GHSA-v98h-vmpc-fpqv",
          "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"
          }
        }
      ]
    }
  }
}