Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/fr3akhacks/cve-disclosures/blob/master/osTicket/CVE-2026-3844
- https://github.com/osTicket/osTicket/blob/develop/include/class.mailparse.php
- https://github.com/osTicket/osTicket/commit/c54a6ac79de42cff35b453882d1d94cd38ad
FAQ
What is CVE-2026-38444?
CVE-2026-38444 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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...
How severe is CVE-2026-38444?
CVE-2026-38444 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-38444?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.