CVE-2026-47759 (GCVE-0-2026-47759)

Vulnerability from cvelistv5 – Published: 2026-05-28 15:20 – Updated: 2026-05-28 15:20
VLAI
Title
TinyMCE Cross-Site Scripting (XSS) vulnerability using through data-mce- prefixed src, href, style attributes
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 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.
Severity
8.7 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
Impacted products
Vendor Product Version
tinymce tinymce Affected: < 5.11.1
Affected: >= 6.0.0, <= 6.8.6
Affected: >= 7.0.0, < 7.9.3
Affected: >= 8.0.0, < 8.5.1
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  "containers": {
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      "affected": [
        {
          "product": "tinymce",
          "vendor": "tinymce",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 5.11.1"
            },
            {
              "status": "affected",
              "version": "\u003e= 6.0.0, \u003c= 6.8.6"
            },
            {
              "status": "affected",
              "version": "\u003e= 7.0.0, \u003c 7.9.3"
            },
            {
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              "version": "\u003e= 8.0.0, \u003c 8.5.1"
            }
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          "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."
        }
      ],
      "metrics": [
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            "availabilityImpact": "NONE",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-28T15:20:11.242Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/tinymce/tinymce/security/advisories/GHSA-q742-qvgc-gc2f",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/tinymce/tinymce/security/advisories/GHSA-q742-qvgc-gc2f"
        },
        {
          "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/7/7.9.3-release-notes/#overview"
        },
        {
          "name": "https://www.tiny.cloud/docs/tinymce/8/8.5.1-release-notes/#overview",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.tiny.cloud/docs/tinymce/8/8.5.1-release-notes/#overview"
        }
      ],
      "source": {
        "advisory": "GHSA-q742-qvgc-gc2f",
        "discovery": "UNKNOWN"
      },
      "title": "TinyMCE Cross-Site Scripting (XSS) vulnerability using through data-mce- prefixed src, href, style attributes"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-47759",
    "datePublished": "2026-05-28T15:20:11.242Z",
    "dateReserved": "2026-05-19T22:36:16.881Z",
    "dateUpdated": "2026-05-28T15:20:11.242Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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