Skip to content
Fencer Vulns
high 8.5

CVE-2026-116675 json

TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` serialization

published 2026-10-27 12 d ago modified 2026-10-28 11 d ago also GHSA-mf2p-h6hf-fcwm , EUVD-2026-111106

cvss
8.5
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 28%
public exploits
0
none known

Summary

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.

Patch / fix

  • npm tinymce 7.9.4, 8.9.3
  • nuget TinyMCE 7.9.4, 8.9.3
  • packagist tinymce/tinymce 7.9.4, 8.9.3

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-116675 updated cvss 5.4

tinymce: tinymce: Stored cross-site scripting via unsanitized media plugin elements

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
11 d ago

Exploit prediction

0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 8.5 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
CNA 4.0 8.5 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected packages

ecosystem package affected fixed in
npm tinymce
>=8.5.1, <8.9.3
>=7.9.3, <7.9.4
8.9.3
7.9.4
nuget TinyMCE
>=8.5.1, <8.9.3
>=7.9.3, <7.9.4
8.9.3
7.9.4
packagist tinymce/tinymce
>=8.5.1, <8.9.3
>=7.9.3, <7.9.4
8.9.3
7.9.4

Affected products

  • tinymce tinymce

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.