CVE-2025-12846: high-severity vulnerability in creativethemeshq Blocksy Companion
Blocksy Companion <= 2.1.19 - Authenticated (Author+) Arbitrary File Upload via SVG Upload Bypass
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.8epss 0.7%
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
creativethemeshq · Blocksy CompanionRelated CVEs — creativethemeshq Blocksy Companion
In the same product, most dangerous first.
CVE-2026-15158CRITICALBlocksy Companion <= 2.1.46 - Unauthenticated Arbitrary File Upload via 'blc-review-images[]' ParameterEPSS 1.1%CVE-2022-4974MEDIUMFreemius SDK <= 2.4.2 - Missing Authorization ChecksEPSS 0.4%CVE-2024-4487MEDIUMBlocksy Companion <= 2.0.45 - Authenticated (Contributor+) Stored Cross-Site Scripting via SVG UploadsEPSS 0.4%CVE-2026-18488MEDIUMBlocksy Companion <= 2.1.51 - Authenticated (Author+) Stored Cross-Site Scripting via 'tagName' Block Attribute (blocksy/dynamic-data)EPSS 0.4%CVE-2024-2392MEDIUMBlocksy Companion <= 2.0.31 - Authenticated (Contributor+) Stored Cross-Site ScriptingEPSS 0.3%CVE-2026-12430MEDIUMBlocksy Companion <= 2.1.45 - Authenticated (Editor+) Stored Cross-Site Scripting via 'product_description' ParameterEPSS 0.3%