CVE intelligence and bounded remediation
CVE-2017-5520 — Metalgenix Genixcms security vulnerability
High
CVSS 8.8
The media rename feature in GeniXCMS through 0.0.8 does not consider alternative PHP file extensions when checking uploaded files for PHP content, which enables a user to rename and execute files with the `.php6`, `.php7` and `.phtml` extensions.
- Severity
- High
- CVSS
- 8.8 (3.0)
- Published
- 2017-01-17
- CISA KEV
- Not currently listed
- Ecosystem
- software/application
- Weaknesses
- CWE-434
Affected products
- metalgenix / genixcms
Matched remediation archetype
Path traversal, unsafe upload, and file handling
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Check exposure
- Trace untrusted filenames, archive entries, URLs, and path segments into read, write, include, extraction, and upload operations.
- Identify filesystem roots, mount permissions, symbolic-link behavior, archive handling, and whether uploaded content is web-accessible or executable.
- Review canonicalization and containment checks across supported operating systems and storage backends.
Remediate safely
- Generate server-side storage identifiers and resolve paths beneath a fixed root using filesystem-aware containment checks.
- Reject absolute, parent-relative, alternate-separator, device, link, and archive entries that escape the intended root.
- Store uploads outside executable or served paths, validate type and size, and use private atomic temporary files.
Authoritative sources
Complete CVE record and remediation plan
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