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CVE-2018-6409

35
FAUCET Score

CVE-2018-6409 is a path traversal vulnerability affecting Appnitro MachForm versions prior to 4.2.3. An attacker can manipulate the 'q' parameter in download.php, combined with modifying the 'ap_form' table, to access arbitrary files on the server. Rated Medium severity (CVSS 5.3), this vulnerability requires no authentication or user interaction and could lead to information disclosure. While not listed on the KEV catalog, public exploit code exists (EDB-44804), though there is no evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
4.2.3CPE matchmatch criteria
cpe:2.3:a:machform:machform:4.2.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.3MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
14.76%
Probability of exploitation in next 30 days
EPSS Percentile
96.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
ExploitDB: EDB-44804 · May 30, 2018
This CVE's current EPSS score of 0.1476 is in the 96th percentile among its peer group of 23,690 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

metalamin.github.io / MachForm-not-0-day-EN
ExploitThird Party Advisory
exploit-db.com / exploits/44804
ExploitThird Party AdvisoryVDB Entry
machform.com / blog-machform-423-security-release
Release NotesVendor Advisory