The viher3 Easy EU Cookie law plugin versions up to 1.3.3.1 contain a stored cross-site scripting vulnerability due to improper input neutralization during web page generation. This flaw allows attackers with low privileges to inject malicious scripts that are stored and later executed in the context of users' browsers, potentially leading to partial compromise of confidentiality, integrity, and availability. The CVSS 3.1 base score is 6.5, reflecting medium severity with network attack vector, low attack complexity, required privileges, and user interaction. No patch or vendor advisory is currently available, and no known exploits have been reported.

Successful exploitation of this stored XSS vulnerability can lead to limited impact on confidentiality, integrity, and availability of affected systems or user data. Attackers may execute arbitrary scripts in the context of users' browsers, potentially enabling session hijacking, defacement, or other malicious actions. However, exploitation requires user interaction and some privileges, which reduces the overall risk.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider disabling or replacing the affected plugin to mitigate risk. Monitor vendor channels for updates and apply patches promptly once released.