The Easy Accordion WordPress plugin up to version 2.3.4 suffers from a stored XSS vulnerability (CWE-79) due to improper neutralization of input in the 'accordion_content_source' attribute. Authenticated users with contributor or higher privileges can inject arbitrary JavaScript that executes in the context of users visiting the compromised page. This vulnerability arises from insufficient input sanitization and output escaping during web page generation. The CVSS 3.1 score is 6.4 (medium severity), reflecting network attack vector, low attack complexity, and privileges required. No patch or vendor advisory is currently provided, and no known exploits have been observed.

Successful exploitation allows authenticated contributors or higher to inject persistent malicious scripts into pages using the vulnerable plugin. This can lead to limited confidentiality and integrity impacts, such as session hijacking or content manipulation, affecting users who view the injected content. There is no direct availability impact. The vulnerability requires authenticated access with contributor-level privileges, limiting the attack surface to users with some level of trust on the site.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, site administrators should restrict contributor-level access to trusted users only and consider disabling or removing the Easy Accordion plugin if possible. Monitoring for unusual script injections in content managed by the plugin may help detect exploitation attempts. Avoid granting contributor or higher privileges to untrusted users.