The 3DVieweronline plugin for WordPress suffers from a stored cross-site scripting vulnerability due to improper neutralization of input during web page generation (CWE-79). The flaw exists in the handling of the '3Dvo-model' shortcode, where user-supplied attributes are not properly sanitized or escaped. This allows authenticated attackers with contributor-level privileges or higher to inject arbitrary JavaScript code into pages. When other users access these pages, the injected scripts execute in their browsers, potentially leading to session hijacking or other client-side impacts. The vulnerability affects all versions up to 2.2.2. No vendor advisory or patch information is currently available, and no known exploits in the wild have been reported.

An attacker with contributor-level access or higher can exploit this vulnerability to inject persistent malicious scripts into WordPress pages using the vulnerable shortcode. This can lead to client-side impacts such as theft of user credentials, session tokens, or other sensitive information when other users view the compromised pages. The CVSS score of 6.4 reflects a medium severity with network attack vector, low attack complexity, and no user interaction required. The vulnerability does not impact availability but affects confidentiality and integrity.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict contributor-level access to trusted users only and consider disabling or removing the 3DVieweronline plugin if possible. Monitor for plugin updates that address this vulnerability and apply them promptly once available.