CVE intelligence and bounded remediation

CVE-2021-24620 — Simple-E-Commerce-Shopping-Cart Project Simple-E-Commerce-Shopping-Cart security vulnerability

High CVSS 8.8

The WordPress Simple Ecommerce Shopping Cart Plugin- Sell products through Paypal plugin through 2.2.5 does not check for the uploaded Downloadable Digital product file, allowing any file, such as PHP to be uploaded by an administrator. Furthermore, as there is no CSRF in place, attackers could also make a logged admin upload a malicious PHP file, which would lead to RCE

Severity
High
CVSS
8.8 (3.1)
Published
2021-09-13
CISA KEV
Not currently listed
Ecosystem
php/wordpress
Weaknesses
CWE-434, CWE-352

Affected products

  • simple-e-commerce-shopping-cart_project / simple-e-commerce-shopping-cart

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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