Vulnerability Report

CVE-2026-38444

Title: Stored Cross-Site Scripting (XSS) in osTicket (email From-header)

XSS

Proof Of Concept

PoC Available for CVE-2026-38444

CWE Category NVD-CWE-noinfo
Published Date Aug 03, 2026
Modified Date Aug 03, 2026
Exploit Status Available
Score 6.1 CVSS v
Exploit Probability (EPSS)
0.30%

Vulnerability Summary

CVE-2026-38444: 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.

Impacted Vendors

Analysis in Progress...

Reference Links

https://github.com/fr3akhacks/cve-disclosures/blob/master/osTicket/CVE-2026-38444.md https://github.com/osTicket/osTicket/blob/develop/include/class.mailparse.php https://github.com/osTicket/osTicket/commit/c54a6ac79de42cff35b453882d1d94cd38adb17f
CVSS v3.1
Source Entity 134c704f-9b21-4f2e-91b3-4a467353bcc0
Severity MEDIUM
6.1
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
REQUIRED
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-38444 Exploits & PoCs (Proof Of Concept)

GitHub https://github.com/fr3akhacks/cve-disclosures
View Code
MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction REQUIRED
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected Stack

No specific products linked.