CVE intelligence and bounded remediation

CVE-2020-27478 — Cross Site Scripting vulnerability found in Simplcommerce v.40734964b0811f3cbaf64b6dac261683d256f961 thru...

High CVSS 7.1

Cross Site Scripting vulnerability found in Simplcommerce v.40734964b0811f3cbaf64b6dac261683d256f961 thru 3103357200c70b4767986544e01b19dbf11505a7 allows a remote attacker to execute arbitrary code via a crafted script to the search bar feature.

Severity
High
CVSS
7.1 (3.1)
Published
2024-04-30
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-79

Affected products

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Matched remediation archetype

Cross-site scripting and unsafe browser output

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Check exposure

  • Trace reflected, stored, and DOM-derived untrusted values into HTML, attributes, URLs, styles, scripts, and client-side template sinks.
  • Identify affected origins, authenticated user roles, sensitive browser capabilities, and where content is shared across tenants.
  • Review framework escaping, rich-text sanitization, legacy templates, and client-side rendering paths.

Remediate safely

  • Use context-aware framework output encoding and safe DOM APIs; keep untrusted data out of executable contexts.
  • Sanitize intentionally supported markup with a maintained allowlist policy and validate URLs and attributes separately.
  • Update affected rendering components and add tests for every output context using inert sentinel markup.

Authoritative sources

Complete CVE record and remediation plan

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