CVE-2025-12846: CWE-434 Unrestricted Upload of File with Dangerous Type in creativethemeshq Blocksy Companion
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.
AI Analysis
Technical Summary
CVE-2025-12846 is an authenticated arbitrary file upload vulnerability in the Blocksy Companion WordPress plugin (creativethemeshq) affecting all versions up to and including 2.1.19. The issue arises from inadequate file type validation that fails to properly detect SVG files, allowing attackers with author-level privileges or higher to upload files with double extensions that bypass sanitization checks. This can lead to arbitrary file uploads on the server, which may facilitate remote code execution. The vulnerability is tracked under CWE-434 (Unrestricted Upload of File with Dangerous Type) and has a CVSS 3.1 base score of 8.8, indicating high impact on confidentiality, integrity, and availability.
Potential Impact
An authenticated attacker with author-level access or above can upload arbitrary files to the affected WordPress site due to improper SVG file validation. This can lead to remote code execution, compromising the server's confidentiality, integrity, and availability. The vulnerability poses a high risk to affected sites, potentially allowing full system compromise.
Mitigation Recommendations
No official patch or remediation is currently available for this vulnerability. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is released, restrict author-level user permissions where possible and monitor for suspicious file uploads. Consider disabling or removing the Blocksy Companion plugin if author-level users cannot be fully trusted.
CVE-2025-12846: CWE-434 Unrestricted Upload of File with Dangerous Type in creativethemeshq Blocksy Companion
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-12846 is an authenticated arbitrary file upload vulnerability in the Blocksy Companion WordPress plugin (creativethemeshq) affecting all versions up to and including 2.1.19. The issue arises from inadequate file type validation that fails to properly detect SVG files, allowing attackers with author-level privileges or higher to upload files with double extensions that bypass sanitization checks. This can lead to arbitrary file uploads on the server, which may facilitate remote code execution. The vulnerability is tracked under CWE-434 (Unrestricted Upload of File with Dangerous Type) and has a CVSS 3.1 base score of 8.8, indicating high impact on confidentiality, integrity, and availability.
Potential Impact
An authenticated attacker with author-level access or above can upload arbitrary files to the affected WordPress site due to improper SVG file validation. This can lead to remote code execution, compromising the server's confidentiality, integrity, and availability. The vulnerability poses a high risk to affected sites, potentially allowing full system compromise.
Mitigation Recommendations
No official patch or remediation is currently available for this vulnerability. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is released, restrict author-level user permissions where possible and monitor for suspicious file uploads. Consider disabling or removing the Blocksy Companion plugin if author-level users cannot be fully trusted.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2025-11-06T20:53:02.971Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69131c131c700d145d0c4ced
Added to database: 11/11/2025, 11:20:51 AM
Last enriched: 4/9/2026, 9:25:47 AM
Last updated: 5/10/2026, 4:12:48 AM
Views: 131
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