CVE-2025-23210 Bypass XSS sanitizer using the javascript protocol and special characters in phpoffice/phpspreadsheet

phpoffice/phpspreadsheet is a pure PHP library for reading and writing spreadsheet files. Affected versions have been found to have a Bypass of the Cross-site Scripting XSS sanitizer using the javascript protocol and special characters. This issue has been addressed in versions 3.9.0, 2.3.7, 2.1....