CVE-2026-48836

Vulnerability

The Easy Invoice plugin for WordPress, version 2.1.19 and earlier, contains an unauthenticated Remote Code Execution (RCE) vulnerability [1]. This flaw allows an attacker to inject and execute arbitrary commands on the target server without requiring any prior authentication or specific configuration, relying on a reachable code path in the plugin's file handling or parameter processing logic.

Exploitation

An attacker with network access to the WordPress site can exploit this vulnerability by sending specially crafted HTTP requests to the vulnerable plugin endpoint [1]. No authentication, user interaction, or special privileges are required. The attack can be automated and is likely to be used in mass-exploit campaigns targeting thousands of websites simultaneously.

Impact

Successful exploitation grants the attacker arbitrary code execution on the web server, effectively leading to full compromise of the WordPress site [1]. This can result in backdoor installation, data theft, defacement, malware distribution, and further lateral movement within the hosting environment.

Mitigation

The vulnerability is resolved in version 2.1.20 of the Easy Invoice plugin [1]. Users are strongly advised to update immediately. If updating is not possible, website administrators should contact their hosting provider for assistance. Patchstack also offers a mitigation rule to block attacks until the patch is applied [1].