WordPress CVEs

Description

The Blocksy Companion plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.1.46 via the save_attachments function. This is due to the Custom Fonts extension registering a wp_check_filetype_and_ext filter that approves any filename containing .woff2 or .ttf as a substring via strpos() rather than validating that those strings appear as the final extension via PATHINFO_EXTENSION — allowing double-extension filenames such as shell.woff2.php to pass MIME validation and be handled as permitted font files. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible. This vulnerability is only exploitable when the premium version of the plugin (blocksy-companion-pro) is installed with both the WooCommerce Extra (Advanced Reviews) and Custom Fonts extensions active; the free blocksy-companion plugin does not contain the vulnerable code paths.

Affected WordPress components

• Blocksy Companion Plugin · blocksy-companion
  Confirmed match Active
  Up to and including 2.1.46
  View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

• creativethemeshq Blocksy Companion — Up to and including 2.1.46

References

• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.46/framework/premium/extensions/custom-fonts/extension.php#L137
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.46/framework/premium/extensions/woocommerce-extra/features/advanced-reviews/feature.php#L811
• www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/2df449b4-3f3b-4afc-b391-8d8d11710c07?source=cve
• nvd.nist.gov Official NVD record