CVE-2025-34077 Scanner

The WordPress Pie Register plugin is a widely used add-on for WordPress sites, developed to facilitate registration and sign-up processes with advanced features. Employed by web administrators and site owners, it simplifies user management and registration by providing custom registration forms and social logins. By integrating smoothly with existing WordPress setups, the plugin offers flexibility for small to medium businesses, bloggers, and online communities needing tailored user registration solutions. With its comprehensive customization capabilities, the Pie Register plugin supports numerous add-ons, enhancing a site's ability to manage users efficiently. This tool is essential for WordPress users aiming to restrict access to content, manage memberships, or gather user data seamlessly. Its robust functionality makes it a preferred choice for those seeking a simple yet powerful registration solution.

The authentication bypass vulnerability within the WordPress Pie Register plugin allows unauthorized attackers to impersonate any user, including administrators. This security flaw is exploited by sending crafted POST requests to the login endpoint, specifically manipulating the 'user_id_social_site' parameter. As a result, an attacker can gain a valid WordPress session for arbitrary user IDs, compromising site security. Once bypassed, the attacker can access sensitive areas of the WordPress administration panel and potentially install malicious plugins. This vulnerability poses a serious risk, especially for sites lacking additional security measures or monitoring. Immediate attention is required to mitigate the potential exploitation and maintain the site's integrity.

Technically, the authentication bypass leverages a crafted POST request where 'social_site=true' is set alongside the 'user_id_social_site' parameter. This request triggers the creation of a legitimate WordPress session cookie for any targeted user ID. To achieve this, attackers focus on the '/login/' interaction point, exploiting the logic that does not correctly validate user authentication. The secondary stage involves exploiting the plugin's ability to upload, allowing insertion of potentially malicious PHP code. The endpoint vulnerability lies specifically in the handling of login requests, which are inadequately secured against such bypass techniques. Subsequently, this flaw permits unauthorized elevation of privileges.

Exploiting the authentication bypass could lead to severe implications for affected WordPress sites. An attacker could gain unauthorized administrative access, allowing manipulation of site content and settings. This could result in data breaches or full site control, with attackers able to deploy malicious plug-ins or scripts. The threat extends to user privacy and data integrity, as private information could be exposed or modified. Additionally, this compromise might integrate the site into a botnet or enable distribution of malware. The resulting damage could be significant, ranging from reputational harm to potential financial loss.

REFERENCES

• https://github.com/MrjHaxcore/CVE-2025-34077
• https://nvd.nist.gov/vuln/detail/CVE-2025-34077
• https://securityvulnerability.io/vulnerability/CVE-2025-34077