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CVE-2018-6411

43
FAUCET Score

CVE-2018-6411 is a critical SQL Injection vulnerability affecting Appnitro MachForm versions prior to 4.2.3. This flaw allows attackers to bypass file upload filters, specifically when the form is configured with a whitelist, leading to the potential execution of dangerous extensions. With a CVSS score of 9.8 (CRITICAL), it presents a severe risk due to its network-based attack vector, low complexity, and high impact on confidentiality, integrity, and availability. While not listed in CISA's KEV catalog and showing no active community discussion or media coverage, exploit code is publicly available via ExploitDB, indicating a clear path for exploitation.

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

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
5.88%
Probability of exploitation in next 30 days
EPSS Percentile
92.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
ExploitDB: EDB-44804 · May 30, 2018
This CVE's current EPSS score of 0.0588 is in the 87th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 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