Security readout for executives and security teams
Plain-English summary
Foxit PhantomPDF versions before 8.3.6 contain a remote code execution flaw tied to PDF navigation actions. If a vulnerable workstation opens a malicious PDF, the impact could include code execution under that user's context. The public bundle does not provide CVSS, affected platform details, or confirmed exploitation.
Executive priority
Treat this as a priority legacy software cleanup if Foxit PhantomPDF is still deployed. The business concern is workstation compromise through malicious documents, but urgency depends on actual presence of pre-8.3.6 installations.
Technical view
CVE-2018-21242 affects Foxit PhantomPDF before 8.3.6. The CVE description says remote code execution is possible via GoToE or GoToR actions. No CWE, CVSS vector, exploit prerequisites, or patch bulletin detail are included in the provided sources beyond the version boundary.
Likely exposure
Exposure is likely limited to systems running Foxit PhantomPDF earlier than 8.3.6, especially users who open PDFs from email, web downloads, or external parties. The bundle does not identify other Foxit products or exact operating systems.
Exploitation context
The source bundle does not show CISA KEV listing or cite active exploitation. The risk model is document-driven: an attacker would need a vulnerable user or workflow to process a crafted PDF containing the relevant action behavior.
Researcher notes
The public record is sparse. It identifies product, version boundary, impact class, and the GoToE/GoToR action area, but omits CVSS, CWE, root cause, affected build matrix, and exploit maturity. Avoid asserting exploitation without additional sourced evidence.
Mitigation direction
- Upgrade Foxit PhantomPDF to version 8.3.6 or later.
- Check Foxit security bulletins for vendor-specific remediation guidance.
- Remove or isolate unsupported legacy PhantomPDF installations.
- Restrict opening untrusted PDFs on systems until upgraded.
Validation and detection
- Inventory endpoints for Foxit PhantomPDF versions earlier than 8.3.6.
- Confirm upgraded systems report PhantomPDF 8.3.6 or later.
- Review email and web workflows that deliver external PDFs to users.
- Check vulnerability management tools for CVE-2018-21242 coverage.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2018-21242 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.foxitsoftware.com/support/security-bulletins.phpCVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.