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Public proof of concept

CVE-2018-6411

A public proof of concept exists; no exploitation attested.

  • Published2018-05-26
  • WeaknessCWE-434

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An issue was discovered in Appnitro MachForm before 4.2.3. When the form is set to filter a blacklist, it automatically adds dangerous extensions to the filters. If the filter is set to a whitelist, the dangerous extensions can be bypassed through ap_form_elements SQL Injection.

Timeline

dates in UTC
  1. 2018-05-30Exploit-DB entryExploit-DB

Versions per branch

NVD
Machform
BranchAffectedFixed in
4.2= 4.2.3no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

Detection

read 2026-11-04 22:56 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
EDB-44804
Exploit-DB
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVSS 3.09.8read 2026-10-23
  • NVDCVSS 2.07.5read 2026-10-23
  • NVDweakness (CWE)CWE-434read 2026-10-23
  • FIRST EPSSEPSS score5.5 %2026-11-04
  • Exploit-DBdetectionread 2026-11-04

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2018-05-26
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2018-6411?

An issue was discovered in Appnitro MachForm before 4.2.3. When the form is set to filter a blacklist, it automatically adds dangerous extensions to the filters. If the filter is set to a whitelist, the dangerous extensions can be bypassed through ap_form_elements SQL Injection.

Is CVE-2018-6411 actively exploited?

Active exploitation of CVE-2018-6411 has not been confirmed. Its EPSS score was 5.5% on 2026-11-04, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-6411?

CVE-2018-6411 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record