GHSA-V98H-VMPC-FPQV

Vulnerability from github – Published: 2026-06-05 20:29 – Updated: 2026-06-05 20:29
VLAI
Summary
TinyMCE Cross-Site Scripting (XSS) vulnerability through `mce:protected` comments
Details

Impact

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.

Patches

Patched by validating decoded mce:protected content against configured protect regex rules before restoring. Users should upgrade to the latest patched version.

Workarounds

No official workaround available.

Fix

To avoid this vulnerability:

Upgrade to TinyMCE 8.5.1 or higher. Upgrade to TinyMCE 7.9.3 or higher. Upgrade to TinyMCE 5.11.1 LTS or higher for TinyMCE 5.x (only available as part of commercial long-term support contract).

Acknowledgements

Tiny thanks Ivan Babenko for their help identifying this vulnerability.

Severity
8.7 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Show details on source website
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c 5.11.1"
      },
      "package": {
        "ecosystem": "npm",
        "name": "tinymce"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "tinymce"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0.0"
            },
            {
              "fixed": "7.9.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "tinymce"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.0.0"
            },
            {
              "fixed": "8.5.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c 5.11.1"
      },
      "package": {
        "ecosystem": "NuGet",
        "name": "TinyMCE"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "TinyMCE"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0.0"
            },
            {
              "fixed": "7.9.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "TinyMCE"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.0.0"
            },
            {
              "fixed": "8.5.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c 5.11.1"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "tinymce/tinymce"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "tinymce/tinymce"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0.0"
            },
            {
              "fixed": "7.9.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "tinymce/tinymce"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.0.0"
            },
            {
              "fixed": "8.5.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-47762"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-05T20:29:07Z",
    "nvd_published_at": "2026-05-28T16:16:28Z",
    "severity": "HIGH"
  },
  "details": "### Impact\nStored 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.\n\n### Patches\nPatched by validating decoded mce:protected content against configured protect regex rules before restoring. Users should upgrade to the latest patched version.\n\n### Workarounds\nNo official workaround available.\n\n### Fix\nTo avoid this vulnerability:\n\nUpgrade to TinyMCE 8.5.1 or higher.\nUpgrade to TinyMCE 7.9.3 or higher.\nUpgrade 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 [Ivan Babenko](https://github.com/he1d3n) for their help identifying this vulnerability.",
  "id": "GHSA-v98h-vmpc-fpqv",
  "modified": "2026-06-05T20:29:07Z",
  "published": "2026-06-05T20:29:07Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/tinymce/tinymce/security/advisories/GHSA-v98h-vmpc-fpqv"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47762"
    },
    {
      "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"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "TinyMCE Cross-Site Scripting (XSS) vulnerability through `mce:protected` comments"
}


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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.

Sightings

Author Source Type Date Other

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.


Detection rules are retrieved from Rulezet.