A reflected Cross-Site Scripting vulnerability in the Arevico WP Tactical Popup plugin allows unauthenticated attackers to execute arbitrary scripts in a user's browser.

This vulnerability is a reflected Cross-Site Scripting (XSS) flaw, categorized as CWE-79. An unauthenticated attacker can supply malicious input that is improperly neutralized during web page generation, leading to the execution of unauthorized scripts in the context of a victim's session.

Successful exploitation of this vulnerability could lead to session hijacking, unauthorized actions performed on behalf of legitimate users, or the redirection of users to malicious websites. With a CVSS score of 7.1, this represents a high-severity risk that could compromise the integrity of user interactions and damage the reputation of the platform if used to target administrative sessions.

Immediate Action: As no official patch version is currently confirmed, administrators should deactivate or remove the WP Tactical Popup plugin until a secure update is released by the vendor.

Proactive Monitoring: Review web server access logs for suspicious URL parameters containing script tags or encoded characters that may indicate XSS probing.

Compensating Controls: Deploy a Web Application Firewall (WAF) with rules configured to detect and block common XSS patterns in incoming HTTP requests.

Public Exploit Available: Unknown.

Given the potential for session compromise, immediate removal of the vulnerable software is recommended until the vendor provides a remediation path. Security teams should prioritize monitoring for anomalous traffic patterns and ensure that all web assets are protected by robust input validation policies.