CVE-2026-22200
HighCVSS 7.5Exploitation Probability (EPSS)
Very high risk99th percentile - higher than 99% of all known CVEs
Summary
A vulnerability in osTicket versions 1.18.x prior to 1.18.3 and 1.17.x prior to 1.17.7 allows a remote attacker to read arbitrary files from the server via ticket PDF export. The attacker can submit a ticket containing crafted rich-text HTML with PHP filter expressions that are insufficiently sanitized before being processed by the mPDF PDF generator. When the ticket is exported to PDF, the generated file can embed contents of attacker-selected files from the server filesystem as bitmap images, leading to disclosure of sensitive local files in the context of the osTicket application user.
Risk Assessment
The risk to the organization is the potential leakage of confidential data, such as configuration files, passwords, or customer data stored on the server. The attack is exploitable in default configurations where guests can create tickets and check their status, or when self-registration is enabled.
Recommendation
It is recommended to immediately upgrade osTicket to version 1.18.3 or later (for the 1.18.x branch) and 1.17.7 or later (for the 1.17.x branch). Also consider restricting ticket creation by unauthenticated users if not required.
Original NVD description (English source)
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.