CVE-2025-7688 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability identified in the Add User Meta plugin for WordPress, maintained by jason-lau. The vulnerability affects all versions up to and including 1.0.1. The root cause is the absence or improper implementation of nonce validation on the 'add-user-meta' administrative page. Nonces are security tokens used in WordPress to verify that requests originate from legitimate users and not from forged sources. Without proper nonce checks, an attacker can craft a malicious request that, when executed by an authenticated administrator (typically via clicking a specially crafted link), causes unauthorized changes to plugin settings or injects malicious web scripts. This can lead to partial compromise of site confidentiality and integrity, such as unauthorized data modification or persistent cross-site scripting (XSS) attacks. The vulnerability does not require any prior authentication (PR:N) but does require user interaction (UI:R), specifically the administrator clicking a malicious link. The CVSS vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), user interaction required (UI:R), scope changed (S:C), and impacts on confidentiality and integrity but not availability (C:L/I:L/A:N). No known exploits have been reported in the wild as of the publication date (August 15, 2025). The vulnerability was reserved on July 15, 2025, and published shortly thereafter. The plugin is widely used in WordPress environments that require extended user metadata management, making affected sites potential targets for exploitation if administrators are tricked into executing malicious requests.

The primary impact of CVE-2025-7688 is on the confidentiality and integrity of affected WordPress sites using the Add User Meta plugin. An attacker can exploit this vulnerability to modify plugin settings or inject malicious scripts by leveraging an administrator's session through social engineering. This can lead to unauthorized data disclosure, defacement, or persistent cross-site scripting attacks that may further compromise user data or site functionality. Although availability is not directly impacted, the injected scripts could be used to facilitate further attacks that degrade service or enable privilege escalation. Organizations relying on this plugin risk unauthorized configuration changes and potential site compromise, which can damage reputation, lead to data breaches, and incur remediation costs. The requirement for administrator interaction limits exploitation ease but does not eliminate risk, especially in environments with less security awareness or targeted phishing campaigns.

To mitigate CVE-2025-7688, organizations should immediately update the Add User Meta plugin to a version that includes proper nonce validation once available. Until a patch is released, administrators should restrict access to the plugin’s administrative pages to trusted personnel only and avoid clicking on untrusted links or emails. Implementing web application firewalls (WAF) with rules to detect and block suspicious CSRF attempts can provide additional protection. Site administrators should enable multi-factor authentication (MFA) to reduce the risk of session hijacking and educate users on phishing and social engineering tactics. Developers maintaining the plugin should add robust nonce verification on all state-changing requests and consider implementing Content Security Policy (CSP) headers to limit the impact of injected scripts. Regular security audits and monitoring for unusual administrative actions can help detect exploitation attempts early.