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Fencer Vulns
high 8.7

CVE-2026-47759 json

TinyMCE Cross-Site Scripting (XSS) vulnerability using through data-mce- prefixed src, href, style attributes

published 2026-05-28 5 mo ago modified 2026-10-14 25 d ago also GHSA-q742-qvgc-gc2f , EUVD-2026-32921

cvss
8.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits
0
none known

Summary

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.

Patch / fix

  • npm tinymce 7.9.3, 8.5.1
  • nuget TinyMCE 7.9.3, 8.5.1
  • packagist tinymce/tinymce 7.9.3, 8.5.1
  • tiny tinymce 5.11.1, 7.9.3, 8.5.1

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-2026-47759 updated cvss 5.4

TinyMCE: Cross-Site Scripting (XSS) vulnerability using through data-mce- prefixed src, href, style attributes

  • 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
5 mo ago

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.7 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
GitHub 3.1 8.7 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Affected packages

ecosystem package affected fixed in
npm tinymce
<=5.10.9
>=6.0.0, <7.9.3
>=8.0.0, <8.5.1
7.9.3
8.5.1
nuget TinyMCE
<=5.10.9
>=6.0.0, <7.9.3
>=8.0.0, <8.5.1
7.9.3
8.5.1
packagist tinymce/tinymce
<=5.10.9
>=6.0.0, <7.9.3
>=8.0.0, <8.5.1
7.9.3
8.5.1

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.