The wpopal Opal Portfolio plugin for WordPress versions up to 1.0.4 contains a stored cross-site scripting vulnerability due to improper input neutralization during web page generation. This allows an attacker with low privileges to inject malicious scripts that execute when other users view the affected pages, potentially impacting confidentiality, integrity, and availability. The CVSS 3.1 vector indicates network attack vector, low attack complexity, low privileges required, user interaction required, and scope changed. No official patch or vendor advisory is currently available.

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary scripts in the context of users viewing the affected portfolio pages. This may lead to limited confidentiality and integrity impacts, such as theft of user session data or modification of displayed content, and limited availability impact. However, exploitation requires user interaction and low privileges, reducing the overall risk. There are no known active exploits reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch is available, users should consider restricting access to the affected plugin or disabling it if possible. Monitoring for suspicious activity related to the plugin is advisable. Avoid relying on generic mitigations unless specifically recommended by the vendor.