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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.
CVSS 6.1EPSS 0.305%Riziko 0.63
Zobraziť zdroj- Zverejnené
- 2026-08-03 19:16:46
- Posledná úprava
- 2026-08-03 20:17:22
- Vektor
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N