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Public proof of conceptFix available

CVE-2026-22200

osTicket (1.18.x < 1.18.3, 1.17.x < 1.17.7) PDF Export Arbitrary File Read

A public proof of concept exists; no exploitation attested.

  • Published2026-01-12
  • Fixed in1.18.3 · 1.17.7
  • WeaknessCWE-74

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2026-01-1218:34CVE publishedCNA
  2. 2026-01-1219:16CVE publishedNVD

Versions per branch

NVD
Enhancesoft osticket
BranchAffectedFixed in
1.18≥ 1.18, < 1.18.31.18.3
1.17≥ 1.17, < 1.17.71.17.7

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As VulnCheck, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Enhancesoft osTicketother versions: not affected

    https://github.com/osTicket/osTicketplatforms: Linux

    Affected
    • ≥ 1.18.0, < 1.18.3fixed in 1.18.3semver
    • ≥ 1.17.0, < 1.17.7fixed in 1.17.7semver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-07-14

Fix

  1. Update Enhancesoft osticket to 1.18.3 · 1.17.7

Advisories and patches

Detection

read 2026-11-01 01:02 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
1 moduleauxiliary/gather/osticket_arbitrary_file_readrank: normalModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 4.0 vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
2026-01-12
Last Modified
2026-07-14
NVD status
Analyzed
GitHub Advisory
GHSA-4hcq-q3qf-q453

Frequently asked questions

What is CVE-2026-22200?

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.

Is CVE-2026-22200 actively exploited?

Active exploitation of CVE-2026-22200 has not been confirmed. Its EPSS score was 73.6% on 2026-11-07, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-22200?

CVE-2026-22200 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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