Cross-site scripting in TinyMCE - CVE-2026-47759

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU131918

Cross-site scripting in TinyMCE - CVE-2026-47759

Published: May 20, 2026 / Updated: September 14, 2026


Vulnerability identifier: #VU131918
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-47759
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote user to execute arbitrary script code in a victim's browser.

The vulnerability exists due to cross-site scripting in data-mce-* attribute handling when parsing and serializing content containing data-mce-href, data-mce-src, or data-mce-style attributes. A remote user can inject malicious attribute values to execute arbitrary script code in a victim's browser.

User interaction is required to process crafted content.


Affected software

TinyMCE
Jira Software Data Center
Jira Service Management Data Center

How to mitigate CVE-2026-47759

Install security update from vendor's website.

TinyMCE - addressed in versions 5.11.1, 7.9.3, 8.5.1
Jira Software Data Center - update to 10.3.25
Jira Service Management Data Center - update to 10.3.25

External References

Related Security Bulletins