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Description

Enhancesoft osTicket versions 1.18.x prior to 1.18.3 and 1.17.x prior to 1.17.7 contain an arbitrary file read vulnerability in the ticket PDF export functionality. A remote attacker can submit a ticket containing crafted rich-text HTML that includes PHP filter expressions which are insufficiently sanitized before being processed by the mPDF PDF generator during export. When the attacker exports the ticket to PDF, the generated PDF can embed the contents of attacker-selected files from the server filesystem as bitmap images, allowing disclosure of sensitive local files in the context of the osTicket application user. This issue is exploitable in default configurations where guests may create tickets and access ticket status, or where self-registration is enabled.

PUBLISHED Reserved 2026-01-06 | Published 2026-01-12 | Updated 2026-01-22 | Assigner VulnCheck




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Product status

Default status
unaffected

1.18.x (semver) before 1.18.3
affected

1.17.x (semver) before 1.17.7
affected

Credits

Naveen Sunkavally, Horizon3.ai finder

References

github.com/osTicket/osTicket/releases/tag/v1.18.3 release-notes

github.com/osTicket/osTicket/releases/tag/v1.17.7 release-notes

github.com/osTicket/osTicket/commit/c59b067 patch

horizon3.ai/...filters-and-cnext-in-osticket-cve-2026-22200/ technical-description exploit

www.vulncheck.com/...osticket-pdf-export-arbitrary-file-read third-party-advisory

cve.org (CVE-2026-22200)

nvd.nist.gov (CVE-2026-22200)

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