This vulnerability involves improper input sanitization in the Greek Namedays Widget from Eortologio.Net, which allows stored cross-site scripting (XSS). An attacker with low privileges can inject malicious scripts that are stored and later executed in the context of users viewing the affected widget. The vulnerability affects versions up to and including 20191113. The CVSS 3.1 vector indicates network attack vector, low attack complexity, low privileges required, user interaction required, and impacts confidentiality, integrity, and availability at a low level.

Successful exploitation could allow an attacker to execute arbitrary scripts in the context of users interacting with the widget, potentially leading to information disclosure, modification of data, or disruption of service. The impact is rated medium based on the CVSS score of 6.5. No known active exploits have been reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. In the absence of an official fix, users should consider disabling or removing the affected widget to prevent exploitation. Monitor vendor channels for updates or patches addressing this vulnerability.