Security readout for executives and security teams
Plain-English summary
MachForm versions before 4.2.3 had a security issue where upload extension filtering could be bypassed when whitelist filtering was used. The sources tie the bypass to SQL injection in form element data. For organizations still running old MachForm, the business risk is unauthorized dangerous file types reaching the application.
Executive priority
Treat this as a high-priority legacy application risk if MachForm remains deployed. Public exploit information exists, and the vendor issued a security release. Patch or retire vulnerable instances before accepting further public uploads.
Technical view
CVE-2018-6411 affects Appnitro MachForm before 4.2.3. The CVE describes a whitelist upload-filter bypass through SQL injection involving ap_form_elements. The source bundle includes a researcher write-up, an Exploit-DB entry, and a vendor 4.2.3 security release, but no CVSS vector or CWE mapping.
Likely exposure
Exposure is most likely on internet-facing MachForm installations before 4.2.3, especially forms with file upload fields and whitelist-based extension filtering. The bundle does not identify affected CPEs, hosting platforms, or downstream packaged products.
Exploitation context
A public Exploit-DB reference and researcher write-up exist, so exploit knowledge was publicly available. The CVE is not listed as KEV in the bundle, and no provided source states active exploitation in the wild.
Researcher notes
The source data is limited: no CVSS, CWE, CPE, or detailed affected configuration matrix is provided. Research should focus on confirming version, upload-filter mode, form upload exposure, and whether suspicious files or configuration changes occurred before remediation.
Mitigation direction
- Upgrade MachForm to version 4.2.3 or later using vendor guidance.
- Prioritize externally reachable forms and any forms accepting file uploads.
- Review whitelist-based upload filter configurations after upgrading.
- Temporarily restrict public access to vulnerable upload forms if immediate upgrade is impossible.
- Check vendor advisories for any additional supported remediation steps.
Validation and detection
- Inventory all MachForm deployments and record exact versions.
- Confirm each deployment is running MachForm 4.2.3 or later.
- Identify forms using upload fields and whitelist extension filtering.
- Review upload directories for unexpected dangerous file types.
- Review application and web logs for suspicious upload or form-configuration activity.
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
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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 lookupCVE-2018-6411 mapping review
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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://metalamin.github.io/MachForm-not-0-day-EN/CVE reference · x_refsource_MISC
- 44804CVE reference · exploit, x_refsource_EXPLOIT-DB
- https://www.machform.com/blog-machform-423-security-release/CVE reference · x_refsource_MISC
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.