Cross-site scripting in TinyMCE - CVE-2026-47762

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Main Vulnerability Database Vulnerabilities #VU131919

Cross-site scripting in TinyMCE - CVE-2026-47762

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


Vulnerability identifier: #VU131919
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-2026-47762
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 in a victim's browser.

The vulnerability exists due to cross-site scripting in mce:protected comment handling when restoring protected content. A remote user can forge mce:protected comments to bypass sanitization and inject script that executes when content is restored to execute arbitrary script in a victim's browser.

Only users who utilize the protect option are affected, and user interaction is required.


Affected software

TinyMCE
Jira Software Data Center
Jira Service Management Data Center

How to mitigate CVE-2026-47762

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