CVE-2026-3891

### 1. **Plain-Language Summary** The Pix for WooCommerce WordPress plugin has a critical flaw allowing anyone (without logging in) to upload any file type to the server due to broken access controls and missing file type checks. This could let attackers execute malicious code on the site. ### 2. **Who is Affected** - **Product**: Pix for WooCommerce plugin for WordPress. - **Versions**: All versions up to and including **1.5.0**. Sites using these versions are vulnerable. ### 3. **Attacker Impact** Unauthenticated attackers can upload **any file** (e.g., malicious scripts, backdoors). This may lead to **remote code execution (RCE)**, enabling them to: - Fully compromise the website/server. - Steal sensitive data or install malware. - Use the server for attacks on other systems. ### 4. **Recommended Remediation Steps** 1. **Update Immediately**: Upgrade the Pix for WooCommerce plugin to a version **newer than 1.5.0** (if available). Check the plugin’s official repository for patched releases. 2. **Mitigate if Unpatched**: - **Disable/Remove** the plugin if no patch exists. - **Review Server Files**: Audit uploads for suspicious files (e.g., `.php`, `.jsp`) in directories like `/wp-content/uploads/` and delete them. 3. **Restrict Access**: Use Web Application Firewall (WAF) rules to block unauthorized upload attempts. 4. **Monitor**: Check logs for unusual file upload activities (e.g., `POST` requests to vulnerable endpoints). **Note**: Given the **CVSS 9.8 (Critical)** severity, prioritize patching within hours.**Sources**: - [CVE-2026-3891](https://cve.mitre.org) - [WordPress Plugin Directory](https://wordpress.org/plugins/pix-for-woocommerce/)