CVE-2026-38444
MEDIUM
NVD
CVSS Score
6.1
Severity
MEDIUM
Published
Aug 03, 2026
Vendor
unknown
Description
osTicket v1.18.3 is vulnerable to Stored Cross-Site Scripting (XSS) via the email From-header display name. The value is extracted without sanitization in include/class.mailparse.php and stored raw in the poster field of ost_thread_entry. When an unauthenticated attacker sends a reply email to an existing ticket from an unregistered address with an XSS payload in the From display name.