CVE-2025-12521 is a vulnerability classified under CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) affecting the Analytify Pro plugin for WordPress, specifically all versions up to and including 7.0.3. The vulnerability arises from the way the plugin renders the Analytify Tag HTML details, which inadvertently exposes usernames in the page source code. This exposure is accessible without any authentication or user interaction, meaning that any remote attacker can retrieve usernames simply by inspecting the source code of affected web pages. While username disclosure alone is often considered a low-severity issue, the vendor requested this be treated as a vulnerability due to its potential to facilitate further attacks such as credential stuffing, brute force, or social engineering. The CVSS v3.1 base score is 5.3 (medium severity), reflecting the network attack vector, low complexity, no privileges required, and no user interaction needed. The vulnerability does not impact the integrity or availability of the system but compromises confidentiality by leaking usernames. No patches or exploits are currently publicly available, but the exposure represents a reconnaissance advantage for attackers targeting WordPress sites using this plugin. The issue is systemic across all versions up to 7.0.3, indicating a need for vendor patching or user mitigation.

For European organizations, this vulnerability primarily threatens the confidentiality of user data by exposing usernames to unauthenticated attackers. While usernames alone do not grant access, their disclosure can significantly aid attackers in launching targeted brute force or credential stuffing attacks, especially if password reuse is common. This can lead to unauthorized access, data breaches, and potential lateral movement within networks. Organizations with high-value WordPress sites using Analytify Pro, such as e-commerce, government portals, or financial services, face increased risk of account compromise. The vulnerability could also undermine user trust and violate data protection regulations like GDPR if combined with other compromised data. Since the vulnerability requires no authentication and is exploitable remotely, it increases the attack surface for European entities relying on this plugin. The absence of known exploits reduces immediate risk but does not eliminate the potential for future attacks.

1. Monitor Analytify Pro vendor communications closely and apply security patches immediately upon release. 2. Until a patch is available, restrict access to pages or endpoints exposing the Analytify Tag HTML details using web application firewalls (WAFs) or server-level access controls. 3. Implement rate limiting and IP blocking to mitigate brute force attempts that could leverage exposed usernames. 4. Encourage users to adopt strong, unique passwords and enable multi-factor authentication (MFA) on WordPress accounts to reduce the risk of credential-based attacks. 5. Regularly audit WordPress plugins and remove or replace those that are no longer maintained or pose security risks. 6. Employ security plugins that can detect and alert on suspicious login attempts or reconnaissance activities. 7. Conduct security awareness training for administrators and users about the risks of username exposure and phishing attacks. 8. Review and harden WordPress configuration to minimize information leakage in source code and error messages.