WordPress · Wp Cerber Security · CVE-2022-2939
**Name of the Vulnerable Software and Affected Versions**
WP Cerber Security plugin for WordPress versions up to, and including 9.0
**Description**
The WP Cerber Security plugin for WordPress is vulnerable to security protection bypass, making user enumeration possible. This is due to improper validation on the value supplied through the `author` parameter found in the ~/cerber-load.php file. In vulnerable versions, the plugin only blocks requests if the value supplied is numeric, making it possible for attackers to supply additional non-numeric characters to bypass the protection. The non-numeric characters are stripped and the user requested is displayed. This can be used by unauthenticated attackers to gather information about users that can be targeted in further attacks.
**Recommendations**
For WP Cerber Security plugin for WordPress versions up to, and including 9.0, update to a version that includes the fix for this issue to prevent user enumeration. As a temporary workaround, consider restricting access to the ~/cerber-load.php file or modifying the validation logic for the `author` parameter to prevent bypassing the security protection.