CVE intelligence and bounded remediation

CVE-2023-5247 — Mitsubishielectric Gx Works3 security vulnerability

High CVSS 7.8

Malicious Code Execution Vulnerability due to External Control of File Name or Path in multiple Mitsubishi Electric FA Engineering Software Products allows a malicious attacker to execute a malicious code by having legitimate users open a specially crafted project file, which could result in information disclosure, tampering and deletion, or a denial-of-service (DoS) condition.

Severity
High
CVSS
7.8 (3.1)
Published
2023-11-30
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-73, CWE-610

Affected products

  • mitsubishielectric / gx_works3
  • mitsubishielectric / melsoft_iq_appportal
  • mitsubishielectric / melsoft_navigator
  • mitsubishielectric / motion_control_setting

Matched remediation archetype

Server-side request forgery and unintended proxying

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Inventory server-side URL fetchers, webhooks, importers, previews, redirects, proxies, and protocol handlers reachable from untrusted input.
  • Map egress paths to internal services, metadata endpoints, loopback, private address space, and privileged control planes.
  • Review DNS resolution, redirect, proxy, credential-forwarding, and URL parsing behavior without requesting sensitive targets.

Remediate safely

  • Replace arbitrary destinations with named integrations or a strict allowlist of schemes, hosts, ports, and paths.
  • Resolve and validate every destination and redirect hop, then enforce egress policy independently of application checks.
  • Remove ambient credentials and sensitive headers from fetchers; apply response size, time, and content limits.

Authoritative sources

Complete CVE record and remediation plan

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