CVE-2026-42411

Vulnerability

CloudSecure WP Security plugin for WordPress versions 1.4.7 and earlier contain an unauthenticated broken authentication vulnerability. The flaw resides in the plugin's authentication mechanism, allowing an attacker to bypass normal privilege checks without any prior authentication. This affects all sites running the plugin up to version 1.4.7.

Exploitation

An attacker can exploit this vulnerability remotely without any authentication or user interaction. By sending specially crafted requests to the vulnerable plugin endpoints, the attacker can trigger the broken authentication logic, effectively assuming the role of a higher-privileged user. The vulnerability is known to be used in mass-exploit campaigns targeting thousands of websites simultaneously [1].

Impact

Successful exploitation grants the attacker the ability to perform actions normally reserved for higher-privileged users, such as administrators. This can lead to full website compromise, including data theft, defacement, or further malware injection. The CVSS score of 8.1 (High) reflects the serious risk of privilege escalation without authentication [1].

Mitigation

The vulnerability is fixed in version 1.4.8 of the plugin. Users are strongly advised to update immediately. If updating is not possible, contacting the hosting provider or a web developer for assistance is recommended. No other workarounds are documented in the available references [1].