ghsa-q742-qvgc-gc2f
CVSS 8.7 osv_packagist
Description
### Impact 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. ### Patches Patched by stripping unsafe data-mce-* attributes during parsing. Users should upgrade to the latest patched versions (5 LTS, 7.x, 8.x). ### 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](https://www.tiny.cloud/long-term-support/) contract). ### Acknowledgements Tiny thanks [Tadi Kadango](https://github.com/mtrill47) ([website](https://tadiwakadango.com/)) and [Ivan Babenko](https://github.com/he1d3n) 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
Linked Vulnerabilities
No linked vulnerabilities found.
{
"affected": [
{
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-q742-qvgc-gc2f/GHSA-q742-qvgc-gc2f.json"
},
"package": {
"ecosystem": "npm",
"name": "tinymce",
"purl": "pkg:npm/tinymce"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.10.9"
}
],
"type": "SEMVER"
}
]
},
{
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-q742-qvgc-gc2f/GHSA-q742-qvgc-gc2f.json"
},
"package": {
"ecosystem": "npm",
"name": "tinymce",
"purl": "pkg:npm/tinymce"
},
"ranges": [
{
"events": [
{
"introduced": "6.0.0"
},
{
"fixed": "7.9.3"
}
],
"type": "SEMVER"
}
]
},
{
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-q742-qvgc-gc2f/GHSA-q742-qvgc-gc2f.json"
},
"package": {
"ecosystem": "npm",
"name": "tinymce",
"purl": "pkg:npm/tinymce"
},
"ranges": [
{
"events": [
{
"introduced": "8.0.0"
},
{
"fixed": "8.5.1"
}
],
"type": "SEMVER"
}
]
},
{
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-q742-qvgc-gc2f/GHSA-q742-qvgc-gc2f.json"
},
"package": {
"ecosystem": "NuGet",
"name": "TinyMCE",
"purl": "pkg:nuget/TinyMCE"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.10.9"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.4.3.2",
"3.4.4",
"3.4.5",
"3.4.7",
"3.5.0",
"3.5.0.1",
"3.5.1",
"3.5.1.1",
"3.5.2",
"3.5.3",
"3.5.4",
"3.5.4.1",
"3.5.5",
"3.5.6",
"3.5.7",
"3.5.8",
"4.0.0",
"4.0.1",
"4.0.10",
"4.0.11",
"4.0.13",
"4.0.14",
"4.0.15",
"4.0.16",
"4.0.17",
"4.0.18",
"4.0.19",
"4.0.2",
"4.0.20",
"4.0.21",
"4.0.22",
"4.0.23",
"4.0.24",
"4.0.25",
"4.0.26",
"4.0.27",
"4.0.28",
"4.0.4",
"4.0.5",
"4.0.6",
"4.0.8",
"4.0.9",
"4.1.0",
"4.1.1",
"4.1.10",
"4.1.2",
"4.1.3",
"4.1.4",
"4.1.5",
"4.1.6",
"4.1.7",
"4.1.8",
"4.1.9",
"4.2.0",
"4.2.1",
"4.2.2",
"4.2.3",
"4.2.4",
"4.2.5",
"4.2.6",
"4.2.7",
"4.2.8",
"4.3.0",
"4.3.1",
"4.3.10",
"4.3.11",
"4.3.12",
"4.3.13",
"4.3.2",
"4.3.3",
"4.3.4",
"4.3.6",
"4.3.7",
"4.3.8",
"4.3.9",
"4.4.0",
"4.4.1",
"4.4.2",
"4.4.3",
"4.5.0",
"4.5.1",
"4.5.2",
"4.5.3",
"4.5.4",
"4.5.5",
"4.5.6",
"4.5.7",
"4.5.8",
"4.6.0",
"4.6.1",
"4.6.2",
"4.6.3",
"4.6.4",
"4.6.5",
"4.6.6",
"4.6.7",
"4.7.0",
"4.7.10",
"4.7.11",
"4.7.12",
"4.7.13",
"4.7.3",
"4.7.4",
"4.7.5",
"4.7.6",
"4.7.7",
"4.7.8",
"4.7.9",
"4.8.0",
"4.8.1",
"4.8.2",
"4.8.3",
"4.8.4",
"4.8.5",
"4.9.0",
"4.9.1",
"4.9.10",
"4.9.11",
"4.9.2",
"4.9.3",
"4.9.4",
"4.9.5",
"4.9.6",
"4.9.7",
"4.9.8",
"4.9.9",
"5.0.0",
"5.0.1",
"5.0.10",
"5.0.11",
"5.0.12",
"5.0.13",
"5.0.14",
"5.0.15",
"5.0.16",
"5.0.2",
"5.0.3",
"5.0.4",
"5.0.5",
"5.0.6",
"5.0.7",
"5.0.8",
"5.0.9",
"5.1.0",
"5.1.1",
"5.1.2",
"5.1.3",
"5.1.4",
"5.1.5",
"5.1.6",
"5.10.0",
"5.10.1",
"5.10.2",
"5.10.3",
"5.10.4",
"5.10.5",
"5.10.6",
"5.10.7",
"5.10.8",
"5.10.9",
"5.2.0",
"5.2.1",
"5.2.2",
"5.3.0",
"5.3.1",
"5.3.2",
"5.4.0",
"5.4.1",
"5.4.2",
"5.5.0",
"5.5.1",
"5.6.0",
"5.6.1",
"5.6.2",
"5.7.0",
"5.7.1",
"5.8.0",
"5.8.1",
"5.8.2",
"5.9.0",
"5.9.1",
"5.9.2"
]
},
{
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-q742-qvgc-gc2f/GHSA-q742-qvgc-gc2f.json"
},
"package": {
"ecosystem": "NuGet",
"name": "TinyMCE",
"purl": "pkg:nuget/TinyMCE"
},
"ranges": [
{
"events": [
{
"introduced": "6.0.0"
},
{
"fixed": "7.9.3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.0.0",
"6.0.1",
"6.0.2",
"6.0.3",
"6.1.0",
"6.1.1",
"6.1.2",
"6.2.0",
"6.3.0",
"6.3.1",
"6.3.2",
"6.4.0",
"6.4.1",
"6.4.2",
"6.5.0",
"6.5.1",
"6.6.2",
"6.7.0",
"6.7.1",
"6.7.2",
"6.7.3",
"6.8.0",
"6.8.1",
"6.8.2",
"6.8.3",
"6.8.4",
"6.8.5",
"6.8.6",
"7.0.0",
"7.0.1",
"7.1.0",
"7.1.1",
"7.1.2",
"7.2.0",
"7.2.1",
"7.3.0",
"7.4.0",
"7.4.1",
"7.5.0",
"7.5.1",
"7.6.0",
"7.6.1",
"7.7.0",
"7.7.1",
"7.7.2",
"7.8.0",
"7.9.0",
"7.9.1",
"7.9.2"
]
},
{
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-q742-qvgc-gc2f/GHSA-q742-qvgc-gc2f.json"
},
"package": {
"ecosystem": "NuGet",
"name": "TinyMCE",
"purl": "pkg:nuget/TinyMCE"
},
"ranges": [
{
"events": [
{
"introduced": "8.0.0"
},
{
"fixed": "8.5.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"8.0.0",
"8.0.1",
"8.0.2",
"8.1.0",
"8.1.1",
"8.1.2",
"8.2.0",
"8.2.1",
"8.2.2",
"8.3.0",
"8.3.1",
"8.3.2",
"8.4.0",
"8.5.0"
]
},
{
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-q742-qvgc-gc2f/GHSA-q742-qvgc-gc2f.json"
},
"package": {
"ecosystem": "Packagist",
"name": "tinymce/tinymce",
"purl": "pkg:composer/tinymce/tinymce"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.10.9"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.0.0",
"4.0.1",
"4.0.10",
"4.0.11",
"4.0.12",
"4.0.13",
"4.0.14",
"4.0.15",
"4.0.16",
"4.0.17",
"4.0.18",
"4.0.19",
"4.0.2",
"4.0.20",
"4.0.21",
"4.0.22",
"4.0.23",
"4.0.24",
"4.0.25",
"4.0.26",
"4.0.27",
"4.0.28",
"4.0.3",
"4.0.4",
"4.0.5",
"4.0.6",
"4.0.7",
"4.0.8",
"4.0.9",
"4.1.0",
"4.1.1",
"4.1.10",
"4.1.2",
"4.1.3",
"4.1.4",
"4.1.5",
"4.1.6",
"4.1.7",
"4.1.8",
"4.1.9",
"4.2.0",
"4.2.1",
"4.2.2",
"4.2.3",
"4.2.4",
"4.2.5",
"4.2.6",
"4.2.7",
"4.2.8",
"4.3.0",
"4.3.1",
"4.3.10",
"4.3.11",
"4.3.12",
"4.3.13",
"4.3.2",
"4.3.3",
"4.3.4",
"4.3.6",
"4.3.7",
"4.3.8",
"4.3.9",
"4.4.0",
"4.4.1",
"4.4.2",
"4.4.3",
"4.5.0",
"4.5.1",
"4.5.12",
"4.5.2",
"4.5.3",
"4.5.4",
"4.5.5",
"4.5.6",
"4.5.7",
"4.5.8",
"4.5.9",
"4.6.0",
"4.6.1",
"4.6.2",
"4.6.3",
"4.6.4",
"4.6.5",
"4.6.6",
"4.6.7",
"4.7.0",
"4.7.1",
"4.7.10",
"4.7.11",
"4.7.12",
"4.7.13",
"4.7.2",
"4.7.3",
"4.7.4",
"4.7.5",
"4.7.6",
"4.7.7",
"4.7.8",
"4.7.9",
"4.8.0",
"4.8.1",
"4.8.2",
"4.8.3",
"4.8.4",
"4.8.5",
"4.9.0",
"4.9.1",
"4.9.10",
"4.9.11",
"4.9.2",
"4.9.3",
"4.9.4",
"4.9.5",
"4.9.6",
"4.9.7",
"4.9.8",
"4.9.9",
"5.0.0",
"5.0.1",
"5.0.10",
"5.0.11",
"5.0.12",
"5.0.13",
"5.0.14",
"5.0.15",
"5.0.16",
"5.0.2",
"5.0.3",
"5.0.4",
"5.0.5",
"5.0.6",
"5.0.7",
"5.0.8",
"5.0.9",
"5.1.0",
"5.1.1",
"5.1.2",
"5.1.3",
"5.1.4",
"5.1.5",
"5.1.6",
"5.10.0",
"5.10.1",
"5.10.2",
"5.10.3",
"5.10.4",
"5.10.5",
"5.10.6",
"5.10.7",
"5.10.8",
"5.10.9",
"5.2.0",
"5.2.1",
"5.2.2",
"5.3.0",
"5.3.1",
"5.3.2",
"5.4.0",
"5.4.1",
"5.4.2",
"5.5.0",
"5.5.1",
"5.6.0",
"5.6.1",
"5.6.2",
"5.7.0",
"5.7.1",
"5.8.0",
"5.8.1",
"5.8.2",
"5.9.0",
"5.9.1",
"5.9.2"
]
},
{
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-q742-qvgc-gc2f/GHSA-q742-qvgc-gc2f.json"
},
"package": {
"ecosystem": "Packagist",
"name": "tinymce/tinymce",
"purl": "pkg:composer/tinymce/tinymce"
},
"ranges": [
{
"events": [
{
"introduced": "6.0.0"
},
{
"fixed": "7.9.3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.0.0",
"6.0.1",
"6.0.2",
"6.0.3",
"6.1.0",
"6.1.1",
"6.1.2",
"6.2.0",
"6.3.0",
"6.3.1",
"6.3.2",
"6.4.0",
"6.4.1",
"6.4.2",
"6.5.0",
"6.5.1",
"6.6.0",
"6.6.1",
"6.6.2",
"6.7.0",
"6.7.1",
"6.7.2",
"6.7.3",
"6.8.0",
"6.8.1",
"6.8.2",
"6.8.3",
"6.8.4",
"6.8.5",
"6.8.6",
"7.0.0",
"7.0.1",
"7.1.0",
"7.1.1",
"7.1.2",
"7.2.0",
"7.2.1",
"7.3.0",
"7.4.0",
"7.4.1",
"7.5.0",
"7.5.1",
"7.6.0",
"7.6.1",
"7.7.0",
"7.7.1",
"7.7.2",
"7.8.0",
"7.9.0",
"7.9.1",
"7.9.2"
]
},
{
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-q742-qvgc-gc2f/GHSA-q742-qvgc-gc2f.json"
},
"package": {
"ecosystem": "Packagist",
"name": "tinymce/tinymce",
"purl": "pkg:composer/tinymce/tinymce"
},
"ranges": [
{
"events": [
{
"introduced": "8.0.0"
},
{
"fixed": "8.5.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"8.0.0",
"8.0.1",
"8.0.2",
"8.1.0",
"8.1.1",
"8.1.2",
"8.2.0",
"8.2.1",
"8.2.2",
"8.3.0",
"8.3.1",
"8.3.2",
"8.4.0",
"8.5.0"
]
}
],
"aliases": [
"CVE-2026-47759"
],
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"github_reviewed": true,
"github_reviewed_at": "2026-06-05T20:27:50Z",
"nvd_published_at": "2026-05-28T16:16:28Z",
"severity": "HIGH"
},
"details": "### Impact\nStored 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.\n\n### Patches\nPatched by stripping unsafe data-mce-* attributes during parsing. Users should upgrade to the latest patched versions (5 LTS, 7.x, 8.x).\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 [Tadi Kadango](https://github.com/mtrill47) ([website](https://tadiwakadango.com/)) and [Ivan Babenko](https://github.com/he1d3n) for their help identifying this vulnerability.",
"id": "GHSA-q742-qvgc-gc2f",
"modified": "2026-09-10T03:51:10.328388649Z",
"published": "2026-06-05T20:27:50Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/tinymce/tinymce/security/advisories/GHSA-q742-qvgc-gc2f"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47759"
},
{
"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": "1.9.0",
"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 using through data-mce- prefixed src, href, style attributes"
}