CVE-2026-38444CWE-79cross-site-scripting

CVE-2026-38444

Medium · published August 3, 2026

CVSS v3.1

6.1

EPSS

Percentile

28.1

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS v3.1: 6.1 · MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0: Not supplied
EPSS: 0.00356 · 28.1th percentile
Weakness: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published: 2026-08-03T23:16Z

References (3)

https://github.com/fr3akhacks/cve-disclosures/blob/master/osTicket/CVE-2026-38444.md · [email protected]https://github.com/osTicket/osTicket/blob/develop/include/class.mailparse.php · [email protected]https://github.com/osTicket/osTicket/commit/c54a6ac79de42cff35b453882d1d94cd38adb17f · [email protected]

EPSS history

Timeline

03 AUG 00:00Z
osTicket v1.18.3 is vulnerable to Stored Cross-Site Scripting (XSS) via the email From-header display name
cvelistv5