TinyMCE Cross-Site Scripting (XSS) vulnerability through `mce:protected` comments
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 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. 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
npm
Introduced 0 Fixed not fixedtinymce
npm
Introduced 6.0.0 Fixed 7.9.3tinymce
npm
Introduced 8.0.0 Fixed 8.5.1TinyMCE
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 6.0.0 Fixed 7.9.3tinymce/tinymce
Packagist
Introduced 8.0.0 Fixed 8.5.1tinymce/tinymce
Packagist
Introduced 0 Fixed not fixed
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | tinymce | 0 | not fixed |
| npm | tinymce | 6.0.0 | 7.9.3 |
| npm | tinymce | 8.0.0 | 8.5.1 |
| NuGet | TinyMCE | 8.0.0 | 8.5.1 |
| NuGet | TinyMCE | 0 | not fixed |
| NuGet | TinyMCE | 6.0.0 | 7.9.3 |
| Packagist | tinymce/tinymce | 6.0.0 | 7.9.3 |
| Packagist | tinymce/tinymce | 8.0.0 | 8.5.1 |
| Packagist | tinymce/tinymce | 0 | not fixed |
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 28, 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 | 0.20% (0.00197) | 9.59th | v5 (v2026.06.15) |
| May 29, 2026 | 0.03% (0.00032) | 9.70th | v4 (v2025.03.14) |
References (5)
- https://github.com/advisories/GHSA-v98h-vmpc-fpqv Advisory
- https://github.com/tinymce/tinymce/security/advisories/GHSA-v98h-vmpc-fpqv x_refsource_CONFIRMVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-47762
- 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-v98h-vmpc-fpqv | Advisory | |
| https://github.com/tinymce/tinymce/security/advisories/GHSA-v98h-vmpc-fpqv | x_refsource_CONFIRMVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2026-47762 | ||
| 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.