CVE-2025-12846 Blocksy Companion <= 2.1.19 - Authenticated (Author+) Arbitrary File Upload via SVG Upload Bypass
Authenticated attackers with author access can upload arbitrary files via SVG bypass, potentially leading to remote code execution on WordPress sites.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-12846?
CVE-2025-12846 is a high-severity vulnerability in creativethemeshq Blocksy Companion, published on 11 Nov 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-434
Which versions are affected by CVE-2025-12846?
How do I fix CVE-2025-12846?
No fix has been published for CVE-2025-12846 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-12846 being exploited?
There is no known exploitation of CVE-2025-12846 in the wild and no public exploit code.
Sources
Also known as GHSA-3j3h-3p2w-f475.