CVE-2025-13516

The record

The SureMail – SMTP and Email Logs Plugin for WordPress is vulnerable to Unrestricted Upload of File with Dangerous Type in versions up to and including 1.9.0. This is due to the plugin's save_file() function in inc/emails/handler/uploads.php which duplicates all email attachments to a web-accessible directory (wp-content/uploads/suremails/attachments/) without validating file extensions or content types. Files are saved with predictable names derived from MD5 hashes of their content. While the plugin attempts to protect this directory with an Apache .htaccess file to disable PHP execution, this protection is ineffective on nginx, IIS, and Lighttpd servers, or on misconfigured Apache installations. This makes it possible for unauthenticated attackers to achieve Remote Code Execution by uploading malicious PHP files through any public form that emails attachments, calculating the predictable filename, and directly accessing the file to execute arbitrary code granted they are exploiting a site running on an affected web server configuration.

Affected packages

Related vulnerabilities

• CVE-2026-8778 The MIPL Grouped Checkout Fields for WooCommerce – Customize & Organize Checkout Fields. CWE-434
• CVE-2026-12215 The OTP Login & Register Woocommerce plugin for WordPress is vulnerable to Authentication… CWE-434
• CVE-2026-18351 The Drag and Drop File Upload for Elementor Forms plugin for WordPress is vulnerable to… CWE-434
• CVE-2026-71805 An arbitrary file upload and path traversal vulnerability exists in LZ-litchi 1.0.0. CWE-434
• CVE-2026-26212 Rara One Click Demo Import plugin for WordPress before 1.3.5 contains an arbitrary file… CWE-434
• CVE-2026-54611 InstantCMS is a free and open source content management system. CWE-434
• CVE-2026-86666 A security flaw has been discovered in aircheng-org iWebShop-5 up to 5.15. CWE-434
• CVE-2026-50093 A vulnerability has been identified in Siveillance Control Pro V3.0 (All versions <… CWE-434