Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
The Blocksy Companion plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.1.46 via the save_attachments function. This is due to the Custom Fonts extension registering a wp_check_filetype_and_ext filter that approves any filename containing .woff2 or .ttf as a substring via strpos() rather than validating that those strings appear as the final extension via PATHINFO_EXTENSION — allowing double-extension filenames such as shell.woff2.php to pass MIME validation and be handled as permitted font files. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible. This vulnerability is only exploitable when the premium version of the plugin (blocksy-companion-pro) is installed with both the WooCommerce Extra (Advanced Reviews) and Custom Fonts extensions active; the free blocksy-companion plugin does not contain the vulnerable code paths.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
AVAILABLE
Momentum
NONE
🚨 CVE-2026-15158 — CVSS 9.8/10 ██████████ The Blocksy Companion plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including,... Severity: CRITICAL Patch now. #cybersecurity #CVE https://t.co/FVedUFC25o
Post summary
CVE‑2026‑15158 is an arbitrary file upload vulnerability in the Blocksy Companion WordPress plugin, rated 9.8/10, with a patch now available.