CVE-2025-49905 identifies a reflected Cross-site Scripting (XSS) vulnerability in the PluginsCafe Range Slider Addon for Gravity Forms, a popular WordPress plugin used to enhance form functionality with range sliders. The vulnerability stems from improper neutralization of user-supplied input during web page generation, allowing malicious actors to inject arbitrary JavaScript code into web pages viewed by other users. Specifically, the addon fails to adequately sanitize or encode input parameters before reflecting them in the HTML output, creating an attack vector for reflected XSS. This flaw affects all versions up to and including 1.1.6. The attack vector is remote and requires no authentication, but user interaction is necessary, typically by tricking a user into clicking a crafted URL containing malicious payloads. Successful exploitation can lead to theft of cookies, session tokens, or other sensitive information, enabling attackers to impersonate victims or perform unauthorized actions within the affected web application. The vulnerability does not impact system availability but compromises confidentiality and integrity. Although no public exploits have been reported yet, the presence of this vulnerability in widely deployed WordPress environments makes it a credible threat. The CVSS v3.1 base score is 6.1, reflecting medium severity with network attack vector, low attack complexity, no privileges required, but user interaction needed, and a scope change due to potential impact beyond the vulnerable component. The vulnerability was reserved in June 2025 and published in November 2025, with no patches currently linked, indicating organizations should monitor vendor advisories closely. Interim mitigations include implementing strict input validation, output encoding, and Content Security Policy (CSP) headers to reduce risk until a patch is available.

For European organizations, this vulnerability poses a risk primarily to websites using WordPress with the Gravity Forms plugin and the vulnerable Range Slider Addon. Exploitation can lead to unauthorized disclosure of sensitive user data such as session cookies, enabling account takeover or impersonation attacks. This can result in data breaches, loss of customer trust, and potential regulatory penalties under GDPR due to compromised personal data. The reflected XSS attack requires user interaction, often via phishing or social engineering, which can be leveraged in targeted campaigns against employees or customers. Public-facing forms on corporate or government websites are particularly vulnerable, potentially exposing critical services or confidential information. Although availability is not impacted, the integrity and confidentiality of user sessions and data are at risk, which can disrupt business operations and damage reputation. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers often weaponize such vulnerabilities rapidly once disclosed. Organizations in sectors with high web presence such as finance, healthcare, and e-commerce in Europe must be vigilant. Additionally, regulatory compliance frameworks in Europe emphasize protection of personal data, increasing the importance of timely remediation.

1. Monitor PluginsCafe and Gravity Forms vendor channels for official patches and apply updates immediately upon release to address CVE-2025-49905. 2. Until patches are available, implement strict input validation on all parameters accepted by the Range Slider Addon to reject or sanitize potentially malicious input. 3. Apply robust output encoding (e.g., HTML entity encoding) on all reflected user inputs to prevent script execution in browsers. 4. Deploy Content Security Policy (CSP) headers to restrict the execution of inline scripts and reduce the impact of XSS attacks. 5. Educate users and administrators about phishing risks and encourage cautious behavior when clicking links, especially those leading to forms using the vulnerable addon. 6. Conduct regular security audits and penetration testing focused on web application vulnerabilities, including XSS. 7. Consider implementing Web Application Firewalls (WAFs) with rules designed to detect and block reflected XSS payloads targeting known vulnerable parameters. 8. Review and limit the use of third-party plugins to those actively maintained and vetted for security. 9. Maintain comprehensive logging and monitoring to detect suspicious activities indicative of exploitation attempts. 10. Prepare incident response plans to quickly address potential compromises resulting from XSS exploitation.