Blocksy Companion <= 2.1.19 - Authenticated (Author+) Arbitrary File Upload via SVG Upload Bypass

Unrestricted Upload of File with Dangerous Type
CVE CVE-2025-12846
CVSS High (8.8)
Publicly Published November 10, 2025
Last Updated November 11, 2025
Researcher shark3y
Description

The Blocksy Companion plugin for WordPress is vulnerable to authenticated arbitrary file upload in all versions up to, and including, 2.1.19. This is due to insufficient file type validation detecting SVG files, allowing double extension files to bypass sanitization while being accepted as a valid SVG file. This makes it possible for authenticated attackers, with author level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible.

References

1 affected software package

Software Type Plugin
Software Slug blocksy-companion (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 2.1.19
Patched Version
  • 2.1.20
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