CVE-2026-116675

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

Published Oct 27, 2026 CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-mf2p-h6hf-fcwm TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` serialization
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Tinymce
Tinymce tinymce
Vendors & Products Tinymce
Tinymce tinymce
Type Values Removed Values Added
Description 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.
Title TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` serialization
Weaknesses CWE-79
References
Metrics cvssV4_0

{'score': 8.5, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Oct 28, 2026, 4:15 PM
Reserved
Oct 26, 2026, 8:00 PM
Status
Awaiting Analysis
Published
Oct 27, 2026, 5:16 PM
Modified
Oct 28, 2026, 5:18 PM