CSIRTS // UNIFIED SECURITY ADVISORY FEEDSYS ● ONLINE · POWERED BY INTELFUSIONS.COM

← Back to feed

GHSA-q742-qvgc-gc2f: TinyMCE Cross-Site Scripting (XSS) vulnerability using through data-mce- prefixed src, href, style attributes

highCVSS 8.7CVE-2026-47759
Impact 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. Patches Patched by stripping unsafe data-mce-* attributes during parsing. Users should upgrade to the latest patched versions (5 LTS, 7.x, 8.x). Workarounds No official workaround available. Fix To avoid this vulnerability: Upgrade to TinyMCE 8.5.1 or higher. Upgrade to TinyMCE 7.9.3 or higher. Upgrade to TinyMCE 5.11.1 LTS or higher for TinyMCE 5.x (only available as part of commercial long-term support contract). Acknowledgements Tiny thanks Tadi Kadango (website) and Ivan Babenko for their help identifying this vulnerability.

Details

Source
GitHub Security Advisories (INTL · database · site)
Severity
high — CVSS 8.7
Published
2026-06-05
Last updated
2026-07-07
Exploitation
Not in CISA KEV at last sync

Original advisory: https://github.com/advisories/GHSA-q742-qvgc-gc2f

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-47759coverage & exploitation statusNVD · CVE.org

More from GitHub Security Advisories