ghsa-mf2p-h6hf-fcwm
CVSS 8.5 osv_npm
Description
### Impact Stored XSS vulnerability in the media plugin. Attackers can inject malicious scripts via elements crafted through the data-mce-object attribute, which are created and executed before sanitization. Impacts users of TinyMCE with the media plugin enabled. ### Patches This vulnerability has been patched in TinyMCE 8.9.3 and TinyMCE 7.9.4 by ensuring that, when using the media plugin, any content created through the data-mce-object attribute is properly sanitized first. ### Workarounds No official workaround available. ### Fix To avoid this vulnerability: Upgrade to TinyMCE 8.9.3 or higher. Upgrade to TinyMCE 7.9.4 or higher. ### Acknowledgements Tiny thanks [Fariskhi Vidyan](https://github.com/farisv) and David Vieira Kurz (HiSolutions AG) for their help identifying this vulnerability.
Timeline
- Published
- unknown
- Last Modified
- unknown
CVSS Details
CVSS details not available.
Affected Products
No product information available.
Weaknesses (CWE)
References
- https://github.com/tinymce/tinymce/security/advisories/GHSA-mf2p-h6hf-fcwm
- https://nvd.nist.gov/vuln/detail/CVE-2026-116675
- https://github.com/tinymce/tinymce/commit/bd1ab5ef024c648c3f9c0b409e54a6c227c7d8a2
- https://github.com/tinymce/tinymce
- https://github.com/tinymce/tinymce/releases/tag/8.9.3
- https://www.tiny.cloud/docs/tinymce/7/7.9.4-release-notes/#overview
- https://www.tiny.cloud/docs/tinymce/latest/8.9.3-release-notes/#overview
Linked Vulnerabilities
No linked vulnerabilities found.
{
"affected": [
{
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mf2p-h6hf-fcwm/GHSA-mf2p-h6hf-fcwm.json"
},
"package": {
"ecosystem": "npm",
"name": "tinymce",
"purl": "pkg:npm/tinymce"
},
"ranges": [
{
"events": [
{
"introduced": "8.5.1"
},
{
"fixed": "8.9.3"
}
],
"type": "SEMVER"
}
]
},
{
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mf2p-h6hf-fcwm/GHSA-mf2p-h6hf-fcwm.json"
},
"package": {
"ecosystem": "NuGet",
"name": "TinyMCE",
"purl": "pkg:nuget/TinyMCE"
},
"ranges": [
{
"events": [
{
"introduced": "8.5.1"
},
{
"fixed": "8.9.3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"8.5.1",
"8.6.0",
"8.7.0",
"8.8.0",
"8.8.1",
"8.8.2",
"8.9.0",
"8.9.1",
"8.9.2"
]
},
{
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mf2p-h6hf-fcwm/GHSA-mf2p-h6hf-fcwm.json"
},
"package": {
"ecosystem": "Packagist",
"name": "tinymce/tinymce",
"purl": "pkg:composer/tinymce/tinymce"
},
"ranges": [
{
"events": [
{
"introduced": "8.5.1"
},
{
"fixed": "8.9.3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"8.5.1",
"8.6.0",
"8.7.0",
"8.8.0",
"8.8.1",
"8.8.2",
"8.9.0",
"8.9.1",
"8.9.2"
]
},
{
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mf2p-h6hf-fcwm/GHSA-mf2p-h6hf-fcwm.json"
},
"package": {
"ecosystem": "npm",
"name": "tinymce",
"purl": "pkg:npm/tinymce"
},
"ranges": [
{
"events": [
{
"introduced": "7.9.3"
},
{
"fixed": "7.9.4"
}
],
"type": "SEMVER"
}
],
"versions": [
"7.9.3"
]
},
{
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mf2p-h6hf-fcwm/GHSA-mf2p-h6hf-fcwm.json"
},
"package": {
"ecosystem": "NuGet",
"name": "TinyMCE",
"purl": "pkg:nuget/TinyMCE"
},
"ranges": [
{
"events": [
{
"introduced": "7.9.3"
},
{
"fixed": "7.9.4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"7.9.3"
]
},
{
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mf2p-h6hf-fcwm/GHSA-mf2p-h6hf-fcwm.json"
},
"package": {
"ecosystem": "Packagist",
"name": "tinymce/tinymce",
"purl": "pkg:composer/tinymce/tinymce"
},
"ranges": [
{
"events": [
{
"introduced": "7.9.3"
},
{
"fixed": "7.9.4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"7.9.3"
]
}
],
"aliases": [
"CVE-2026-116675"
],
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"github_reviewed": true,
"github_reviewed_at": "2026-10-27T21:07:12Z",
"nvd_published_at": "2026-10-27T17:16:59Z",
"severity": "HIGH"
},
"details": "### Impact\nStored XSS vulnerability in the media plugin. Attackers can inject malicious scripts via elements crafted through the data-mce-object attribute, which are created and executed before sanitization. Impacts users of TinyMCE with the media plugin enabled.\n\n### Patches\nThis vulnerability has been patched in TinyMCE 8.9.3 and TinyMCE 7.9.4 by ensuring that, when using the media plugin, any content created through the data-mce-object attribute is properly sanitized first.\n\n### Workarounds\nNo official workaround available.\n\n### Fix\nTo avoid this vulnerability:\n\nUpgrade to TinyMCE 8.9.3 or higher.\nUpgrade to TinyMCE 7.9.4 or higher.\n\n### Acknowledgements\nTiny thanks [Fariskhi Vidyan](https://github.com/farisv) and David Vieira Kurz (HiSolutions AG) for their help identifying this vulnerability.",
"id": "GHSA-mf2p-h6hf-fcwm",
"modified": "2026-10-27T21:15:04.912450737Z",
"published": "2026-10-27T21:07:12Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/tinymce/tinymce/security/advisories/GHSA-mf2p-h6hf-fcwm"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116675"
},
{
"type": "WEB",
"url": "https://github.com/tinymce/tinymce/commit/bd1ab5ef024c648c3f9c0b409e54a6c227c7d8a2"
},
{
"type": "PACKAGE",
"url": "https://github.com/tinymce/tinymce"
},
{
"type": "WEB",
"url": "https://github.com/tinymce/tinymce/releases/tag/8.9.3"
},
{
"type": "WEB",
"url": "https://www.tiny.cloud/docs/tinymce/7/7.9.4-release-notes/#overview"
},
{
"type": "WEB",
"url": "https://www.tiny.cloud/docs/tinymce/latest/8.9.3-release-notes/#overview"
}
],
"schema_version": "1.9.2",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` serialization"
}