SB2026052049 - Cross-site scripting in TinyMCE
Published: May 20, 2026
Security Bulletin ID
SB2026052049
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Cross-site scripting (CVE-ID: N/A)
CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSSv4: 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/E:U/U:Clear
The vulnerability allows a remote user to execute arbitrary JavaScript.
The vulnerability exists due to improper SVG namespace scope handling in the sanitizer when parsing crafted content with nested SVG elements. A remote user can supply a specially crafted payload to execute arbitrary JavaScript.
User interaction is required to process the crafted content.
Remediation
Install update from vendor's website.