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.
Published: 2026-08-03
Score: n/a
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Mon, 03 Aug 2026 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Osticket
Osticket osticket
Vendors & Products Osticket
Osticket osticket

Mon, 03 Aug 2026 18:30:00 +0000

Type Values Removed Values Added
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.
References

Subscriptions

Osticket Osticket
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-08-03T19:31:07.711Z

Reserved: 2026-04-06T00:00:00.000Z

Link: CVE-2026-38444

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-03T19:30:04Z

Weaknesses

No weakness.