VulnerabilityAnalyzed

CVE-2026-47759

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).

MEDIUM 5.4EPSS 0.28%

Does this matter?

Lower severity and a low EPSS score (0.28%). Track it; it rarely justifies an emergency change on its own.

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 3.1: 5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
EPSS: 0.28% probability · 21th percentile
CISA KEV: Not listed
Weakness: CWE-79
Affected: tiny/tinymce
Source: security-advisories@github.com

References

https://github.com/tinymce/tinymce/security/advisories/GHSA-q742-qvgc-gc2fPatch, Vendor Advisory
https://www.tiny.cloud/docs/tinymce/7/7.9.3-release-notes/#overviewRelease Notes
https://www.tiny.cloud/docs/tinymce/8/8.5.1-release-notes/#overviewRelease Notes

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.