Is this vulnerability remotely exploitable?

Yes. In typical configurations where guests can open tickets and view their status or where user self-registration is enabled, a remote attacker can submit a crafted ticket and then trigger PDF export through the user interface.

What level of access does an attacker need?

The attacker generally only needs the ability to create or control ticket content and to access the relevant ticket's PDF export functionality. No administrative privileges are required if the portal allows public or self-registered users to export tickets they own.

What is the safest general fix pattern?

The safest approach is to ensure that all user-supplied HTML is rigorously sanitized before being passed to mPDF, using an allowlist of safe tags, attributes, and URL schemes, and to block any constructs that could be interpreted as filters or local file references. Additionally, configure the rendering environment so that it cannot freely access sensitive local files.

Severity:

HIGH RISK

(7.5)

Server-Side Injection via mPDF Filters (CWE-74) in osTicket Ticket PDF Export

CVE-2026-22200

Published:

Jan 12, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-306

CRITICAL RISK

CRITICAL

(9.8)

Missing Authentication for Forgot-Password Email Change API (CWE-306)

Account Takeover / Loss of Account Control

February 17, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in node-sonos-http-api TTS Provider for macOS

Remote Code Execution on the Server Host

February 17, 2026

Vulnerability Type

Category:

Server-Side Injection

CWE:

CWE-74

Impact:

Arbitrary File Read / Information Disclosure

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Server-Side Injection

CWE:

CWE-74

Impact:

Arbitrary File Read / Information Disclosure

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Server-Side Injection via mPDF Filters (CWE-74) in osTicket Ticket PDF Export

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

CRITICAL RISK

CRITICAL

(9.8)

Missing Authentication for Forgot-Password Email Change API (CWE-306)

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in node-sonos-http-api TTS Provider for macOS

Vulnerability Type

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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