CVE-2025-64258 identifies a security vulnerability in the 'Follow My Blog Post' WordPress plugin developed by wpweb, specifically affecting all versions up to 2.3.9. The flaw involves the exposure of sensitive system information to unauthorized users, classified as an information disclosure vulnerability. This occurs because the plugin improperly restricts access to embedded sensitive data, allowing attackers to retrieve information that could include configuration details, system paths, or other internal data. Such information can be leveraged to facilitate further attacks, including privilege escalation or targeted exploitation of other vulnerabilities. The vulnerability does not have an assigned CVSS score and no public exploit code has been reported yet. The lack of authentication requirement suggests that any unauthenticated user visiting a vulnerable site could potentially exploit this issue. The plugin is commonly used in WordPress environments to enable blog post following features, meaning that websites employing this plugin are at risk. The vulnerability was reserved in late October 2025 and published in mid-December 2025, indicating recent discovery. No official patches or updates have been linked, so users must rely on interim protective measures. The exposure of sensitive system information primarily impacts confidentiality and could indirectly affect integrity and availability if leveraged in chained attacks.

For European organizations, this vulnerability poses a significant risk to the confidentiality of sensitive system information hosted on WordPress sites using the affected plugin. Disclosure of such information can facilitate reconnaissance by attackers, increasing the likelihood of successful targeted attacks, including privilege escalation or data breaches. Organizations in sectors with high web presence, such as media, e-commerce, and government, could face reputational damage and regulatory consequences under GDPR if sensitive data is compromised. The ease of exploitation without authentication increases the threat surface, particularly for publicly accessible websites. While no active exploits are known, the potential for rapid weaponization exists once details become widespread. This could lead to increased incident response costs and operational disruptions. The vulnerability may also affect the integrity of web applications if attackers use the disclosed information to manipulate site behavior or inject malicious content. Overall, the threat could undermine trust in affected web services and necessitate urgent remediation efforts.

European organizations should immediately inventory their WordPress installations to identify the presence of the 'Follow My Blog Post' plugin and verify the version in use. Until an official patch is released, restrict access to the plugin’s functionality by implementing web application firewalls (WAF) rules to block suspicious requests targeting the plugin endpoints. Employ strict access controls and limit exposure of sensitive data through server configuration and WordPress hardening best practices. Monitor web server logs for unusual access patterns that may indicate exploitation attempts. Consider temporarily disabling or removing the plugin if it is not critical to business operations. Engage with the plugin vendor or community to track patch releases and apply updates promptly once available. Additionally, conduct regular security assessments and penetration testing focused on WordPress environments to detect similar vulnerabilities. Educate web administrators on the risks of outdated plugins and the importance of timely updates. Implement network segmentation to isolate critical systems from publicly accessible web servers hosting vulnerable plugins.