This vulnerability in Andy Fragen Embed PDF Viewer (versions up to 2.3.1) involves improper neutralization of input during web page generation, allowing cross-site scripting attacks. The CVSS 3.1 score is 5.9 (medium), with an attack vector of network, low attack complexity, requiring high privileges and user interaction, and causing limited impact on confidentiality, integrity, and availability. No vendor advisory or patch information is provided, and the product is not a cloud service.

Successful exploitation could allow an attacker with high privileges and user interaction to execute malicious scripts in the context of the affected application, potentially leading to limited disclosure of information, modification of data, or disruption of service. However, the impact is rated medium and no known exploits exist in the wild at this time.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should exercise caution with input handling and consider restricting access to trusted users only. Monitor vendor channels for updates regarding patches or official mitigations.