LiveActive security incident?Get immediate response
CVE Record

CVE-2018-6409: An issue was discovered in Appnitro MachForm before 4.2.3.

An issue was discovered in Appnitro MachForm before 4.2.3. The module in charge of serving stored files gets the path from the database. Modifying the name of the file to serve on the corresponding ap_form table leads to a path traversal vulnerability via the download.php q parameter.

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2018-6409 is a path traversal flaw in Appnitro MachForm before 4.2.3. If file-serving records are manipulated, MachForm can be made to serve unintended filesystem paths through its download flow. This can expose sensitive files, but the sources do not provide CVSS scoring or confirmed active exploitation.

Executive priority

Treat this as high priority for any exposed MachForm deployment. The business risk is sensitive file disclosure from a public web application, with public exploit material available but no confirmed active exploitation in the provided sources.

Technical view

MachForm’s stored-file serving module reads the file path from the database. The CVE describes modifying the relevant ap_form table file name so the download.php q parameter resolves to a traversal path. Public exploit material is referenced, and Appnitro released MachForm 4.2.3 as a security release.

Likely exposure

Organizations running Appnitro MachForm before 4.2.3 are the exposed population. Internet-facing form portals and systems storing uploaded files deserve priority review.

Exploitation context

The source bundle includes an Exploit-DB reference, indicating public exploit information exists. CISA KEV status is false, and the provided sources do not claim active exploitation in the wild.

Researcher notes

The CVE metadata lacks CVSS, CWE, and structured affected-product entries, so severity must be inferred from the vulnerability class and public exploit reference. Do not assume broader Appnitro products are affected. The fix boundary supported by the bundle is MachForm 4.2.3.

Mitigation direction

  • Upgrade MachForm to version 4.2.3 or later.
  • Review Appnitro’s 4.2.3 security release guidance.
  • Restrict administrative and database access to trusted operators only.
  • Check stored file metadata for unexpected traversal-like path values.
  • Monitor download activity for unusual file retrieval patterns.

Validation and detection

  • Inventory all MachForm installations and record their versions.
  • Confirm no production instance is older than 4.2.3.
  • Review ap_form file metadata for unexpected path-like entries.
  • Check access logs for abnormal download.php activity.
  • Validate file-download behavior after applying vendor updates.
Prepared
Confidence
medium
Sources
5

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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

description · low confidence lookup

Database behavior lookup

The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
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.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2018-6409 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
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.

0CVSS vectors
0Timeline events
0ADP providers
4Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

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