CVE-2026-25394 identifies a Missing Authorization vulnerability in the Fitness FSE plugin developed by sparklewpthemes, specifically affecting versions up to and including 1.0.6. The core issue stems from incorrectly configured access control security levels within the plugin, which fails to properly enforce authorization checks on certain functions or endpoints. This misconfiguration allows an attacker to bypass intended restrictions and perform unauthorized actions, potentially including viewing, modifying, or deleting sensitive data managed by the plugin. Fitness FSE is a WordPress Full Site Editing (FSE) theme/plugin tailored for fitness-related websites, which often handle personal health information and user data. The vulnerability does not currently have a CVSS score assigned and no public exploits have been reported, indicating it may be newly discovered or not yet weaponized. However, the lack of authorization checks inherently poses a significant risk to the confidentiality and integrity of affected systems. Exploitation likely requires the attacker to have some level of access to the WordPress environment but does not require user interaction, making automated or remote exploitation feasible if access is gained. The vulnerability was published on February 19, 2026, with no patches currently linked, emphasizing the need for prompt vendor response and user vigilance. Given the plugin’s niche in fitness websites, organizations in health and wellness sectors using WordPress should prioritize assessment and remediation. The vulnerability’s impact spans unauthorized data access, potential data manipulation, and disruption of website functionality, which could undermine user trust and regulatory compliance, especially under GDPR in Europe.

For European organizations, this vulnerability poses a significant risk to the confidentiality and integrity of sensitive user data, particularly in fitness and health-related websites that utilize the Fitness FSE plugin. Unauthorized access could lead to exposure of personal health information, violating GDPR and other privacy regulations, resulting in legal penalties and reputational damage. Integrity breaches could allow attackers to alter content or user data, undermining trust and potentially causing operational disruptions. Availability impact is less direct but possible if unauthorized changes disrupt site functionality. The ease of exploitation without user interaction increases the threat level, especially for organizations with insufficient internal access controls or outdated plugin versions. The vulnerability could also be leveraged as a foothold for further attacks within the network. European companies relying on WordPress for customer engagement or data management in the fitness sector must consider this a high-priority risk to their cybersecurity posture.

1. Monitor sparklewpthemes and official WordPress plugin repositories for patches addressing CVE-2026-25394 and apply updates immediately upon release. 2. Conduct a thorough audit of access control configurations within the Fitness FSE plugin and the broader WordPress environment to ensure that only authorized users have administrative or editing privileges. 3. Restrict plugin usage to trusted administrators and limit plugin capabilities where possible using role-based access controls or WordPress capability management plugins. 4. Implement web application firewalls (WAF) with custom rules to detect and block suspicious requests targeting Fitness FSE endpoints. 5. Regularly review WordPress logs for unusual activity indicative of exploitation attempts. 6. Educate site administrators on the risks of unauthorized access and enforce strong authentication mechanisms, including multi-factor authentication (MFA) for WordPress admin accounts. 7. Consider isolating fitness-related WordPress sites or deploying them in segmented network zones to limit lateral movement if compromised. 8. Backup site data frequently and verify restoration procedures to minimize impact from potential data tampering.