WordPress KiviCare plugin <= 3.6.16 - Reflected Cross Site Scripting (XSS) vulnerability

An attacker could exploit this Reflected XSS vulnerability by crafting a malicious URL containing JavaScript code. When a user clicks on this URL, the injected script executes in their browser within the context of the KiviCare Clinic Management System. This allows the attacker to steal sensitive information like user credentials, session tokens, or personal data stored within the application. Furthermore, the attacker could potentially redirect the user to a phishing site or deface the website. The impact is amplified if the application is used by healthcare professionals handling sensitive patient information, as a successful attack could compromise patient privacy and data security.

Healthcare providers and clinics utilizing the KiviCare Clinic Management System, particularly those running versions 0.0.0 through 3.6.16, are at significant risk. Shared hosting environments where multiple websites share the same server resources are also at increased risk, as a compromise of one website could potentially lead to the exploitation of this vulnerability on other sites.

• wordpress: Use wp-cli to check plugin versions and identify outdated installations.

wp plugin list --update=safe

• wordpress: Search plugin files for instances of unsanitized user input using grep.

grep -r '$_GET' /var/www/html/kivicare-clinic-management-system/plugins/

• generic web: Monitor access logs for unusual URL parameters containing JavaScript code. Look for patterns like <script> or javascript:. • generic web: Examine response headers for signs of XSS, such as the presence of injected script tags.

1. 2026-03-25Disclosure

   disclosure

1. Reserviert2026-02-02
2. Veröffentlicht2026-03-25
3. Geändert2026-04-28
4. EPSS aktualisiert2026-04-02

The primary mitigation for CVE-2026-25383 is to upgrade the KiviCare Clinic Management System to version 4.0.0 or later, which contains the fix for this vulnerability. If upgrading immediately is not possible, consider implementing input validation and output encoding on all user-supplied data to prevent the injection of malicious scripts. Web Application Firewalls (WAFs) can be configured to filter out malicious requests containing XSS payloads. Regularly review and update WordPress security plugins to ensure they are up-to-date and provide additional protection against XSS attacks. After upgrading, confirm the fix by attempting to inject a simple JavaScript payload via a URL parameter and verifying that it is properly sanitized.

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