XSS in Tiny Tinymce
CVE-2026-47759
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (19.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 19.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Tiny Tinymce
- Tinymce — versions < 5.11.1, >= 6.0.0, <= 6.8.6, >= 7.0.0, < 7.9.3
Weakness classification (CWE)
References
- github.com/tinymce/tinymce/security/advisories/GHSA-q742-qvgc-gc2f (Patch, Vendor Advisory)
- www.tiny.cloud/docs/tinymce/7/7.9.3-release-notes/ (Release Notes)
- www.tiny.cloud/docs/tinymce/8/8.5.1-release-notes/ (Release Notes)
Frequently asked questions
- What is CVE-2026-47759?
- CVE-2026-47759 is a high-severity vulnerability in Tiny Tinymce, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2026-05-28.
- How severe is CVE-2026-47759?
- High severity. CVSS v3 base score is 8.7 out of 10.