CVE-2025-49392 is a stored Cross-site Scripting (XSS) vulnerability classified under CWE-79, affecting the Themify Audio Dock plugin developed by themifyme, specifically versions up to 2.0.5. Stored XSS vulnerabilities occur when untrusted input is improperly sanitized or neutralized during web page generation, allowing malicious scripts to be permanently stored on the target server and executed in the context of users' browsers when they access the affected pages. In this case, the vulnerability arises from the plugin's failure to properly sanitize user-supplied input before rendering it in the web interface, enabling attackers to inject malicious JavaScript code. The CVSS v3.1 base score is 5.9 (medium severity), with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), requiring privileges (PR:H), user interaction (UI:R), scope changed (S:C), and low impact on confidentiality, integrity, and availability (C:L/I:L/A:L). The requirement for privileges and user interaction suggests that exploitation would likely require an authenticated user with some level of access to the plugin's input fields and that the victim must interact with the malicious content for the attack to succeed. Although no known exploits are currently reported in the wild, the vulnerability poses a risk of session hijacking, defacement, or redirection to malicious sites if exploited. The vulnerability was published on August 20, 2025, and no official patches have been linked yet, indicating that affected users should monitor for updates or apply mitigations promptly.

For European organizations using the Themify Audio Dock plugin, this vulnerability could lead to unauthorized script execution within the browsers of authenticated users, potentially compromising session tokens, user credentials, or enabling phishing attacks through manipulated content. This can result in data breaches, loss of user trust, and reputational damage. Given the plugin's use in audio-related web content, organizations in media, entertainment, and digital marketing sectors may be particularly impacted. The requirement for authenticated access limits the attack surface but does not eliminate risk, especially in environments with multiple users or less stringent access controls. Additionally, the scope change in the CVSS vector indicates that exploitation could affect resources beyond the immediate vulnerable component, potentially impacting broader application functionality or user data. European organizations must consider compliance with GDPR and other data protection regulations, as exploitation leading to personal data exposure could result in regulatory penalties.

1. Immediate mitigation should include restricting access to the Themify Audio Dock plugin to only trusted and necessary users, minimizing the number of accounts with privileges to input data into the plugin. 2. Implement strict input validation and output encoding on all user-supplied data fields related to the plugin, ideally using a web application firewall (WAF) with custom rules to detect and block malicious payloads targeting this vulnerability. 3. Monitor web application logs for unusual input patterns or script injections related to the plugin. 4. Educate users with access about the risks of interacting with untrusted content and encourage cautious behavior regarding links or content generated via the plugin. 5. Stay updated with vendor advisories and apply official patches as soon as they become available. 6. If patching is delayed, consider temporarily disabling the plugin or removing it from production environments where feasible. 7. Conduct regular security assessments and penetration testing focusing on web application input sanitization and stored XSS vectors to identify and remediate similar issues proactively.