What’s Vulnerable › Vulnerabilities

CVE-2026-47759: TinyMCE Cross-Site Scripting (XSS) vulnerability using through data-mce- prefixed src, href, style attributes

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-28 · updated 2026-10-14
• Weakness: CWE-79

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 products

• tinymce: before 5.11.1; from 6.0.0 before 7.9.3; from 8.0.0 before 8.5.1 — fixed in 5.11.1, 7.9.3, 8.5.1

How to fix

Upgrade to a fixed version: tinymce 5.11.1, 7.9.3, 8.5.1. Check the vendor advisory for mitigations.

References

• https://github.com/tinymce/tinymce/security/advisories/GHSA-q742-qvgc-gc2f
• https://www.tiny.cloud/docs/tinymce/7/7.9.3-release-notes/#overview
• https://www.tiny.cloud/docs/tinymce/8/8.5.1-release-notes/#overview

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