This vulnerability in Giveaways and Contests by PromoSimple (versions <= 1.24) allows stored cross-site scripting due to improper input neutralization during web page generation. An attacker with at least low privileges and requiring user interaction could inject malicious scripts that execute in the context of other users, potentially leading to partial confidentiality, integrity, and availability impacts. The CVSS 3.1 vector indicates network attack vector, low attack complexity, low privileges required, user interaction required, and a scope change with low impacts on confidentiality, integrity, and availability.

Successful exploitation could allow an attacker to execute arbitrary scripts in the context of other users, potentially leading to partial disclosure of information, modification of data, or disruption of service within the affected application. The impact is limited by the requirement for user interaction and low privileges, and the overall severity is medium.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should monitor the vendor's communications for updates. In the meantime, restricting user input or applying web application firewall rules to detect and block malicious payloads may help mitigate risk.