The revmakx WPCal.io plugin suffers from a DOM-based XSS vulnerability due to improper input neutralization during web page generation. This allows attackers with at least low privileges and requiring user interaction to execute scripts that can impact confidentiality, integrity, and availability to a limited extent. The vulnerability affects versions up to and including 0.9.5.9. No vendor advisory or patch information is currently available.

Successful exploitation could allow an attacker to execute arbitrary scripts in the context of the victim's browser, potentially leading to limited disclosure or modification of data and partial disruption of service. The CVSS vector indicates network attack vector, low attack complexity, low privileges required, user interaction required, and scope changed, with low impact on confidentiality, integrity, and availability.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch or official fix is available, users should exercise caution with this plugin, restrict privileges where possible, and avoid interacting with untrusted content that could trigger the vulnerability.