CVE-2018-6409

Status: ModifiedMedium (5.3)—Exploit

Severity5.3Medium · CVSS 3.0

Exploitation probability14 %higher than 97% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitAvailablePublished on Exploit-DB

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.

CVSS

Base score: 5.3
Version: 3.0
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 14 %
Percentile among all scored CVEs: 97
Score date: 10/20/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Published on Exploit-DB · MachForm < 4.2.3 - SQL Injection / Path Traversal / Upload Bypass (5/30/2018)

Affected technologies (1)

Machform — Machform

CWEs

CWE-22

References

Show 6 references

Raw JSON (NVD)

Show

{
  "id": "CVE-2018-6409",
  "cveTags": [],
  "metrics": {
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
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          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
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        "impactScore": 1.4,
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  "affected": [
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      "affectedData": [
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  "published": "2018-05-26T22:29:00.370",
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      "url": "https://www.machform.com/blog-machform-423-security-release/",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "Se ha descubierto un problema en Appnitro MachForm, en versiones anteriores a la 4.2.3. El módulo encargado de servir archivos almacenados obtiene la ruta de la base de datos. La modificación del nombre del archivo que se debe servir en la tabla ap_form correspondiente conduce a una vulnerabilidad de salto de directorio mediante el parámetro q en download.php."
    }
  ],
  "lastModified": "2026-06-17T02:01:48.853",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
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}