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CVE Record

CVE-2026-22200: osTicket (1.18.x < 1.18.3, 1.17.x < 1.17.7) PDF Export Arbitrary File Read

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.

HighCVSS 8.7Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2026-22200 lets an unauthenticated remote attacker read sensitive files from an osTicket server through the ticket-to-PDF export feature. Public portals that allow guest ticket creation or self-registration are most exposed. The issue is high urgency because leaked local files can include configuration secrets or other sensitive server data.

Executive priority

Treat as urgent for public-facing osTicket systems. Prioritize patching because the issue can expose sensitive server files without authentication in common configurations. If patching is delayed, reduce external access paths and disable high-risk account or ticket workflows where feasible.

Technical view

osTicket 1.18.x before 1.18.3 and 1.17.x before 1.17.7 insufficiently sanitize crafted rich-text HTML before mPDF processing. PHP filter expressions can cause attacker-selected local files to be embedded into exported PDFs as bitmap images, disclosing files readable by the osTicket application user. CVSS v4.0 score is 8.7.

Likely exposure

Internet-facing osTicket deployments are most at risk when guests can create tickets and view ticket status, or when self-registration is enabled. Internal helpdesks are less exposed but still at risk from any user able to create and export tickets.

Exploitation context

The source bundle includes public technical analysis and an exploit-tagged reference, but CISA KEV status is false and no cited source establishes active exploitation. The vulnerability is remotely reachable, low-complexity, and requires no privileges or user interaction per the provided CVSS vector.

Researcher notes

Focus validation on version range, PDF export behavior, and unauthenticated ticket workflows. The provided description ties impact to local file disclosure in the osTicket application user context. Avoid assuming code execution or active exploitation unless confirmed by cited sources or later advisories.

Mitigation direction

  • Upgrade osTicket 1.18.x to 1.18.3 or later.
  • Upgrade osTicket 1.17.x to 1.17.7 or later.
  • Review the linked osTicket release notes and patch commit.
  • Restrict guest ticket creation if upgrade cannot occur immediately.
  • Disable or limit self-registration where operationally feasible.
  • Monitor vendor guidance for any additional hardening advice.

Validation and detection

  • Inventory all osTicket instances and exposed support portals.
  • Confirm deployed versions are 1.18.3, 1.17.7, or later.
  • Check whether guest ticket creation is enabled.
  • Check whether self-registration is enabled.
  • Confirm ticket PDF export functionality is patched after upgrade.
  • Review web and application logs for suspicious ticket HTML or PDF export activity.
Prepared
Confidence
high
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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cwe · low confidence lookup

CWE-74: Exact CWE lookup

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description · low confidence lookup

File access behavior lookup

The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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cve · low confidence lookup

CVE-2026-22200 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
8.7 (4.0)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
3Timeline events
1ADP providers
6Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: partial

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
8.7CVSS 4.0HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N——VulnCheck

Vulnerability scoring details

Base CVSS 4.0 score

8.7High
CVSS 4.0 vector shape for CVE-2026-22200Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Attack Requirements
NonePresent
Privileges Required
NoneLowHigh
User Interaction
NonePassiveActive
VS Confidentiality
HighLowNone
VS Integrity
HighLowNone
VS Availability
HighLowNone
SS Confidentiality
HighLowNone
SS Integrity
HighLowNone
SS Availability
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
EnhancesoftosTicket1.18.0, 1.17.0unaffected
Weakness

CWE details

CWE-74

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-74 · source CWE mapping

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

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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