CVE intelligence and bounded remediation

CVE-2021-24349 — This Gallery from files WordPress plugin through 1.6.0 gives the functionality of uploading images to the server

Medium CVSS 6.1

This Gallery from files WordPress plugin through 1.6.0 gives the functionality of uploading images to the server. But filenames are not properly sanitized before being output in an error message when they have an invalid extension, leading to a reflected Cross-Site Scripting issue. Due to the lack of CSRF check, the attack could also be performed via such vector.

Severity
Medium
CVSS
6.1 (3.1)
Published
2021-06-14
CISA KEV
Not currently listed
Ecosystem
php/wordpress
Weaknesses
CWE-79, CWE-352

Affected products

  • gallery_from_files_project / gallery_from_files

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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