CVE-2025-8059 in B Blocks Plugin
Summary
by MITRE • 08/12/2025
The B Blocks plugin for WordPress is vulnerable to Privilege Escalation due to missing authorization and improper input validation within the rgfr_registration() function in all versions up to, and including, 2.0.6. This makes it possible for unauthenticated attackers to create a new account and assign it the administrator role.
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Analysis
by VulDB Data Team • 08/12/2025
The vulnerability identified as CVE-2025-8059 affects the B Blocks plugin for WordPress, representing a critical privilege escalation flaw that undermines the security posture of affected systems. This issue stems from inadequate authorization controls and insufficient input validation mechanisms within the plugin's core functionality, specifically within the rgfr_registration() function that handles user registration processes. The flaw exists across all versions of the plugin up to and including version 2.0.6, making it a widespread concern for WordPress administrators who have not yet updated their installations.
The technical nature of this vulnerability allows unauthenticated attackers to exploit missing authorization checks during the registration process, effectively bypassing the normal security controls that should prevent unauthorized users from gaining administrative privileges. The improper input validation within the rgfr_registration() function fails to properly sanitize or validate user inputs, creating a pathway for malicious actors to manipulate the registration flow and assign elevated privileges to newly created accounts. This represents a classic case of insufficient access control where the system does not properly verify the identity or authorization level of users attempting to perform privileged operations.
The operational impact of this vulnerability is severe and far-reaching, as it enables attackers to gain complete administrative control over affected WordPress installations without requiring any prior authentication credentials. Once an attacker successfully exploits this vulnerability, they can execute arbitrary code, modify or delete content, install malicious plugins, alter user permissions, and potentially use the compromised system as a pivot point for further attacks within the network. The implications extend beyond simple account takeover, as administrative access provides attackers with unrestricted control over the entire website and its underlying infrastructure, potentially leading to data breaches, service disruption, and reputational damage.
Organizations should prioritize immediate remediation by updating the B Blocks plugin to a version that addresses this vulnerability, as the flaw affects all versions up to 2.0.6. Security teams should also implement monitoring for suspicious registration activities and consider implementing additional access controls such as rate limiting for registration endpoints. This vulnerability aligns with CWE-862, which addresses insufficient authorization, and maps to ATT&CK technique T1078.004 for valid accounts, as attackers can leverage this flaw to obtain administrative credentials without detection. The incident underscores the critical importance of regular security auditing and prompt patch management in maintaining WordPress security postures.