TinyMCE Cross-Site Scripting (XSS) vulnerability using through data-mce- prefixed src, href, style attributes
Published May 28, 2026
8.7
HIGHCVSS 3.1
EPSS 0.42%
Description
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.
Affected products
-
- Version < 5.11.1StatusaffectedConstraints-
- Version >= 6.0.0, <= 6.8.6StatusaffectedConstraints-
- Version >= 7.0.0, < 7.9.3StatusaffectedConstraints-
- Version >= 8.0.0, < 8.5.1StatusaffectedConstraints-
- Version
No data.
No Red Hat product state for this CVE.
TinyMCE
NuGet
Introduced 8.0.0 Fixed 8.5.1TinyMCE
NuGet
Introduced 0 Fixed not fixedTinyMCE
NuGet
Introduced 6.0.0 Fixed 7.9.3tinymce/tinymce
Packagist
Introduced 8.0.0 Fixed 8.5.1tinymce/tinymce
Packagist
Introduced 0 Fixed not fixedtinymce/tinymce
Packagist
Introduced 6.0.0 Fixed 7.9.3tinymce
npm
Introduced 0 Fixed not fixedtinymce
npm
Introduced 6.0.0 Fixed 7.9.3tinymce
npm
Introduced 8.0.0 Fixed 8.5.1
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| NuGet | TinyMCE | 8.0.0 | 8.5.1 |
| NuGet | TinyMCE | 0 | not fixed |
| NuGet | TinyMCE | 6.0.0 | 7.9.3 |
| Packagist | tinymce/tinymce | 8.0.0 | 8.5.1 |
| Packagist | tinymce/tinymce | 0 | not fixed |
| Packagist | tinymce/tinymce | 6.0.0 | 7.9.3 |
| npm | tinymce | 0 | not fixed |
| npm | tinymce | 6.0.0 | 7.9.3 |
| npm | tinymce | 8.0.0 | 8.5.1 |
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
1 other source (GHSA) ▾
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed May 30, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
May–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.42% (0.00416) | 33.59th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.21% (0.00209) | 10.97th | v5 (v2026.06.15) |
| May 29, 2026 | 0.03% (0.00032) | 9.70th | v4 (v2025.03.14) |
References (5)
- https://github.com/advisories/GHSA-q742-qvgc-gc2f Advisory
- https://github.com/tinymce/tinymce/security/advisories/GHSA-q742-qvgc-gc2f x_refsource_CONFIRMPatchVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-47759
- https://www.tiny.cloud/docs/tinymce/7/7.9.3-release-notes/#overview x_refsource_MISCRelease Notes
- https://www.tiny.cloud/docs/tinymce/8/8.5.1-release-notes/#overview x_refsource_MISCRelease Notes
| Link | Providers | Tags |
|---|---|---|
| https://github.com/advisories/GHSA-q742-qvgc-gc2f | Advisory | |
| https://github.com/tinymce/tinymce/security/advisories/GHSA-q742-qvgc-gc2f | x_refsource_CONFIRMPatchVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2026-47759 | ||
| https://www.tiny.cloud/docs/tinymce/7/7.9.3-release-notes/#overview | x_refsource_MISCRelease Notes | |
| https://www.tiny.cloud/docs/tinymce/8/8.5.1-release-notes/#overview | x_refsource_MISCRelease Notes |
Change history (0)
No recorded changes yet.