CVE-2026-47759

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.

CVSS v3.1 Score

8.7

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

EPSS — Exploit Prediction

0.0021

Probability of exploitation

0.11%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
tiny	tinymce	< 5.11.1
tiny	tinymce	6.0.0 — 7.9.3
tiny	tinymce	8.0.0 — 8.5.1

References

Advisories & Patches

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

Other References

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

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 8.7 (HIGH).

How severe is CVE-2026-47759? +

CVE-2026-47759 has a CVSS v3.1 score of 8.7 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0021, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-47759? +

CVE-2026-47759 affects products from tiny, specifically: tinymce. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-47759? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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