CVE intelligence and bounded remediation

CVE-2020-15189 — SOY CMS 3.0.2 and earlier is affected by Remote Code Execution (RCE) using Unrestricted File Upload

High CVSS 7.2

SOY CMS 3.0.2 and earlier is affected by Remote Code Execution (RCE) using Unrestricted File Upload. Cross-Site Scripting(XSS) vulnerability that was used in CVE-2020-15183 can be used to increase impact by redirecting the administrator to access a specially crafted page. This vulnerability is caused by insecure configuration in elFinder. This is fixed in version 3.0.2.328.

Severity
High
CVSS
7.2 (3.1)
Published
2020-09-18
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-434

Affected products

  • brassica / soy_cms

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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