The Media Player Addons for Elementor plugin version 1.0.5 suffers from a stored cross-site scripting vulnerability (CWE-79) due to improper neutralization of input during web page generation. Specifically, the parameters 'subtitle_ssize', 'track_title', and 'track_artist_name' do not properly sanitize or escape user-supplied data, allowing authenticated users with contributor-level access or higher to inject arbitrary scripts. These scripts execute in the context of any user viewing the compromised page, potentially leading to session hijacking or other script-based attacks. The vulnerability has a CVSS 3.1 base score of 6.4 (medium severity), with network attack vector, low attack complexity, and no user interaction required. There is no indication of an official patch or vendor advisory at this time.

Successful exploitation allows authenticated contributors or higher to inject persistent malicious scripts into pages using the vulnerable plugin parameters. This can lead to unauthorized actions executed in the context of other users viewing the affected pages, such as session theft or defacement. The impact is limited to confidentiality and integrity with no direct availability impact. The vulnerability requires authenticated access with contributor privileges or above, reducing the attack surface compared to unauthenticated attacks.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict contributor-level access to trusted users only and consider disabling or removing the vulnerable plugin if feasible. Monitor official bplugins communications for updates regarding patches or mitigations.