CVE intelligence and bounded remediation

CVE-2020-36883 — Spinetix Fusion Digital Signage security vulnerability

High CVSS 8.8

SpinetiX Fusion Digital Signage 3.4.8 and lower contains an authenticated path traversal vulnerability that allows attackers to manipulate file backup and deletion operations through unverified input parameters. Attackers can exploit path traversal techniques in index.php to write backup files to arbitrary locations and delete files by manipulating backup and file delete requests.

Severity
High
CVSS
8.8 (4.0)
Published
2025-12-10
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-22

Affected products

  • spinetix / fusion_digital_signage

Matched remediation archetype

Path traversal, unsafe upload, and file handling

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

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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