CVE-2026-1219 is an authorization bypass vulnerability classified under CWE-639 (Insecure Direct Object Reference) affecting the Sonaar MP3 Audio Player – Music Player, Podcast Player & Radio plugin for WordPress, specifically versions 4.0 through 5.10. The flaw exists in the 'load_track_note_ajax' functionality, where a user-controlled key parameter is not properly validated or authorized before use. This lack of validation allows unauthenticated attackers to bypass access controls and retrieve the contents of private posts, which may include sensitive audio files or metadata. The vulnerability is exploitable remotely over the network without any authentication or user interaction, increasing its risk profile. However, the impact is limited to confidentiality as the attacker cannot modify or delete data, nor disrupt service availability. No public exploits or active exploitation campaigns have been reported to date. The vulnerability was reserved in January 2026 and published in February 2026. The CVSS v3.1 base score of 5.3 reflects its medium severity, with attack vector network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), unchanged scope (S:U), and limited confidentiality impact (C:L). This vulnerability primarily affects WordPress sites using this plugin to manage audio content, potentially exposing private media to unauthorized viewers.

For European organizations, the primary impact is the unauthorized disclosure of private audio content hosted on WordPress sites using the Sonaar MP3 Audio Player plugin. This could include sensitive podcasts, proprietary music, or confidential audio notes, leading to breaches of confidentiality and potential intellectual property loss. Organizations in media, entertainment, education, and corporate sectors that rely on private audio content distribution are particularly at risk. While the vulnerability does not affect data integrity or availability, the exposure of private content could damage reputation, violate data protection regulations such as GDPR, and result in legal or compliance consequences. Since exploitation requires no authentication and can be performed remotely, the attack surface is broad, especially for publicly accessible WordPress sites. The absence of known exploits in the wild reduces immediate risk but does not eliminate the threat, as attackers may develop exploits following public disclosure. The impact is thus moderate but significant for entities with sensitive audio content.

1. Monitor for and apply official patches or updates from Sonaar as soon as they are released to address CVE-2026-1219. 2. Until patches are available, restrict access to the 'load_track_note_ajax' AJAX endpoint by implementing web application firewall (WAF) rules that block unauthenticated requests or limit access to trusted IP ranges. 3. Implement strict input validation and authorization checks on all user-controlled parameters, particularly the key parameter used in AJAX calls, to ensure only authorized users can access private content. 4. Review and audit WordPress plugin usage and configurations to identify and disable unnecessary or vulnerable plugins. 5. Employ security plugins that can detect and block unauthorized access attempts to AJAX endpoints. 6. Conduct regular security assessments and penetration testing focused on WordPress installations to identify similar insecure direct object references or authorization bypass issues. 7. Educate site administrators about the risks of exposing private content through plugins and encourage best practices for content access control. 8. Maintain comprehensive logging and monitoring to detect suspicious access patterns targeting AJAX endpoints.