CVE-2026-47759

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

MEDIUM

5.4

CVSS Score

Published: May 28, 2026 at 03:20 PM UTC

Updated: October 14, 2026 at 08:10 PM UTC

2 products affected across 2 vendorsTinymceTinymce

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Severity

MEDIUM5.4

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Tinymce · Tiny

95%

All versionsv < 5.11.16.0.0 ≤ v < 7.9.38.0.0 ≤ v < 8.5.1

Tinymce · Tinymce

90%

v < 5.11.1

Affected range stops below 5.11.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.9.3, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.5.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://github.com/tinymce/tinymce/security/advisories/GHSA-q742-qvgc-gc2f

References (3)

x_refsource_CONFIRMPatchVendor Advisory

Source: cverecord

https://github.com/tinymce/tinymce/security/advisories/GHSA-q742-qvgc-gc2f

x_refsource_MISCRelease Notes

Source: cverecord

https://www.tiny.cloud/docs/tinymce/7/7.9.3-release-notes/#overview

x_refsource_MISCRelease Notes

Source: cverecord

https://www.tiny.cloud/docs/tinymce/8/8.5.1-release-notes/#overview

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUM[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: LOW
User Interaction: REQUIRED
Scope: CHANGED
Confidentiality: LOW
Integrity: LOW
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-79

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