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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.

PUBLISHED Reserved 2025-11-06 | Published 2025-11-11 | Updated 2025-11-14 | Assigner Wordfence




HIGH: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem types

CWE-434 Unrestricted Upload of File with Dangerous Type

Product status

Default status
unaffected

* (semver)
affected

Timeline

2025-10-30:Discovered
2025-11-06:Vendor Notified
2025-11-10:Disclosed

Credits

Angus Girvan finder

References

www.wordfence.com/...-5db7-495d-9956-7d6f658f42bf?source=cve

plugins.trac.wordpress.org/...unk/framework/features/svg.php

cve.org (CVE-2025-12846)

nvd.nist.gov (CVE-2025-12846)

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