CVE-2025-52367 is a Cross Site Scripting (XSS) vulnerability identified in PivotX CMS version 3.0.0 RC 3. This vulnerability arises from insufficient sanitization or validation of user input in the subtitle field, allowing a remote attacker to inject malicious scripts. When a victim views the affected subtitle content, the injected script executes in their browser context. The vulnerability is classified under CWE-79, which pertains to improper neutralization of input during web page generation. The CVSS v3.1 base score is 5.4 (medium severity), with the vector indicating that the attack can be performed remotely over the network (AV:N), requires low attack complexity (AC:L), requires privileges (PR:L), and user interaction (UI:R). The scope is changed (S:C), meaning the vulnerability affects resources beyond the initially vulnerable component. The impact on confidentiality and integrity is low, with no impact on availability. No known exploits are currently in the wild, and no patches have been published yet. This vulnerability could be leveraged to execute arbitrary JavaScript code in the context of the affected site, potentially leading to session hijacking, defacement, or redirection to malicious sites. The requirement for privileges and user interaction somewhat limits the ease of exploitation but does not eliminate risk, especially in environments where authenticated users have access to subtitle editing or content management features.

For European organizations using PivotX CMS 3.0.0 RC 3, this vulnerability poses a moderate risk. Exploitation could lead to unauthorized script execution in the browsers of users who view the compromised subtitle field, potentially exposing session tokens, user credentials, or enabling phishing attacks. This can undermine user trust and lead to data leakage or unauthorized actions performed on behalf of users. Since the vulnerability requires authenticated access with low privileges and user interaction, insider threats or compromised accounts could be leveraged to exploit it. European organizations in sectors such as media, publishing, education, or government that utilize PivotX CMS for content management may face reputational damage and compliance risks under GDPR if personal data is exposed or manipulated. The scope change indicates that the impact could extend beyond the immediate component, possibly affecting other parts of the web application or user sessions.

1. Immediately restrict access to subtitle editing features to trusted and verified users only, minimizing the risk of malicious input. 2. Implement strict input validation and output encoding on the subtitle field to neutralize any injected scripts, following OWASP XSS prevention guidelines. 3. Monitor logs for unusual activity related to subtitle field modifications, especially from accounts with low privileges. 4. Educate users about the risks of clicking on suspicious links or interacting with untrusted content within the CMS environment. 5. If possible, disable or limit the use of the subtitle field until a security patch or update is released by the PivotX CMS maintainers. 6. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers accessing the CMS. 7. Regularly update and patch the CMS once a fix becomes available and perform thorough security testing on all input fields.