CVE-2026-66596

Versions of the Newsletter application up to 9.3.3 are vulnerable to unauthenticated Cross Site Scripting (XSS), allowing attackers to inject malicious scripts into web pages viewed by users. This vulnerability can lead to session hijacking, data theft, or defacement of the site, posing significant risks to user trust and data integrity. Organizations using affected versions should prioritize remediation to safeguard against potential exploitation.