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TI-2026-81439 Aliases CVE-2026-116675GHSA-mf2p-h6hf-fcwm

Cross-site scripting in TinyMCE media plugin via data-mce-object

Priority LOW 39CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

The media plugin in TinyMCE, an open source rich text editor, is affected from 7.9.3 before 7.9.4 and from 8.5.1 before 8.9.3. It creates elements crafted through data-mce-object in the active document before sanitization. Those elements can run malicious scripts, causing stored cross-site scripting (CWE-79) for users with the media plugin enabled. An attacker with low privileges can exploit this, and user interaction is required.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

TinyMCE is an open source rich text editor. From 7.9.3 until 7.9.4 and from 8.5.1 until 8.9.3, the media plugin creates elements crafted through data-mce-object in the active document before sanitization. Those elements can execute malicious scripts during processing, resulting in stored cross-site scripting for users with the media plugin enabled. This issue is fixed in versions 8.9.3 and 7.9.4.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00349 28th percentileScored 2026-11-07
Fix Fixed tinymce (tinymce): 8.9.3, 7.9.4tinymce (npm): 8.9.3, 7.9.4+2 more products

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
tinymcetinymce8.5.1 to before 8.9.3; 7.9.3 to before 7.9.48.9.3, 7.9.4Patch availableCNA
—tinymce (npm)8.5.1 to before 8.9.38.9.3Patch availableGHSA-mf2p-h6hf-fcwm
—TinyMCE (NuGet)8.5.1 to before 8.9.38.9.3Patch availableGHSA-mf2p-h6hf-fcwm
—tinymce/tinymce (Packagist)8.5.1 to before 8.9.38.9.3Patch availableGHSA-mf2p-h6hf-fcwm
—tinymce (npm)7.9.3 to before 7.9.47.9.4Patch availableGHSA-mf2p-h6hf-fcwm
—TinyMCE (NuGet)7.9.3 to before 7.9.47.9.4Patch availableGHSA-mf2p-h6hf-fcwm
—tinymce/tinymce (Packagist)7.9.3 to before 7.9.47.9.4Patch availableGHSA-mf2p-h6hf-fcwm
  • tinymce Vendortinymce Affected 8.5.1 to before 8.9.3; 7.9.3 to before 7.9.4 Fixed in 8.9.3, 7.9.4 Patch available CNA
  • tinymce (npm) Vendor— Affected 8.5.1 to before 8.9.3 Fixed in 8.9.3 Patch available GHSA-mf2p-h6hf-fcwm
  • TinyMCE (NuGet) Vendor— Affected 8.5.1 to before 8.9.3 Fixed in 8.9.3 Patch available GHSA-mf2p-h6hf-fcwm
  • tinymce/tinymce (Packagist) Vendor— Affected 8.5.1 to before 8.9.3 Fixed in 8.9.3 Patch available GHSA-mf2p-h6hf-fcwm
  • tinymce (npm) Vendor— Affected 7.9.3 to before 7.9.4 Fixed in 7.9.4 Patch available GHSA-mf2p-h6hf-fcwm
  • TinyMCE (NuGet) Vendor— Affected 7.9.3 to before 7.9.4 Fixed in 7.9.4 Patch available GHSA-mf2p-h6hf-fcwm
  • tinymce/tinymce (Packagist) Vendor— Affected 7.9.3 to before 7.9.4 Fixed in 7.9.4 Patch available GHSA-mf2p-h6hf-fcwm

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:tiny:tinymce:*:*:*:*:*:*:*:*——Tiny
  • cpe:2.3:a:tiny:tinymce:*:*:*:*:*:*:*:* Versions — — ·Tiny

Remediation

Upgrade the tinymce package to 8.9.3 for the 8.x line or 7.9.4 for the 7.x line. For npm, NuGet and Packagist, use tinymce 8.9.3 or 7.9.4 for the same lines.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA tinymce (tinymce) Fixed in 8.9.3, 7.9.4
  • Fix · GHSA-mf2p-h6hf-fcwm tinymce (npm) Fixed in 8.9.3 Advisory →
  • Fix · GHSA-mf2p-h6hf-fcwm TinyMCE (NuGet) Fixed in 8.9.3 Advisory →
  • Fix · GHSA-mf2p-h6hf-fcwm tinymce/tinymce (Packagist) Fixed in 8.9.3 Advisory →
  • Fix · GHSA-mf2p-h6hf-fcwm tinymce (npm) Fixed in 7.9.4 Advisory →
  • Fix · GHSA-mf2p-h6hf-fcwm TinyMCE (NuGet) Fixed in 7.9.4 Advisory →
  • Fix · GHSA-mf2p-h6hf-fcwm tinymce/tinymce (Packagist) Fixed in 7.9.4 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-27 Threatist record created from CVE-2026-116675
  2. 2026-10-27 Alias added: GHSA-mf2p-h6hf-fcwm
  3. 2026-10-28 CISA SSVC decision points changed
  4. 2026-10-28 Priority changed: MEDIUM → LOW
  5. 2026-11-06 Affected versions changed · Red Hat
  6. 2026-11-06 CVSS score added · Red Hat

References

Advisory 1

Other 6

  • TI-2011-04153 Static code injection vulnerability in inc/function.base.php in Ajax File and Image… CVSS 2.0HIGH 7.5
  • TI-2026-35259 TinyMCE Cross-Site Scripting (XSS) vulnerability through `mce:protected` comments CVSS 3.1HIGH 8.7
  • TI-2026-35258 TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` injection CVSS 3.1HIGH 8.7
  • TI-2026-35256 TinyMCE Cross-Site Scripting (XSS) vulnerability using through data-mce- prefixed src, href, style attributes CVSS 3.1HIGH 8.7
  • TI-2026-35257 TinyMCE Cross-Site Scripting (XSS) vulnerability using sanitization bypass through nested SVGs CVSS 3.1HIGH 8.7
  • TI-2014-03123 Cross-site request forgery (CSRF) vulnerability in the TinyMCE Color Picker plugin before… CVSS 2.0MEDIUM 6.8
See all 20 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences