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{"analysis": {"en": {"generated_at": "2026-04-22T17:55:29.185237+00:00", "value": {"mitigation_remediation": ["Update the plugin to the latest version 4.1.0 or later, which removes the reflected XSS flaw", "If patching is temporarily infeasible, disable the 's' parameter by blocking the query string or applying a directive in WordPress\u2019s .htaccess to reject requests containing 's'", "Implement a server\u2011side sanitization or output\u2011escaping layer for any plugin parameters that may accept user input, ensuring DOM or template contexts do not render raw data"], "summary": {"action": "Patch Now", "impact": "Reflected Cross\u2011Site Scripting"}, "threat_synthesis": {"affected_systems": "The affected product is the WordPress plugin \"User Registration & Membership \u2013 Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder\" by WPEverest. Versions up to and including 4.0.4 are vulnerable. Any WordPress installation using these plugin versions is at risk.", "description_and_impact": "The vulnerability allows unauthenticated attackers to inject arbitrary scripts through the 's' parameter in various plugin pages. This reflected cross\u2011site scripting flaw results in the execution of malicious JavaScript in a victim\u2019s browser when the victim follows a crafted URL or link. The primary impact is the compromise of user session data, credential theft, and the ability to load further malicious content. The weakness is identified as CWE\u201179, which highlights a lack of proper input sanitization and output escaping on the server side.", "risk_and_exploitability": "The CVSS score of 6.1 indicates moderate severity, while the EPSS score of less than 1% shows a low probability of exploitation at the current moment, and the vulnerability is not listed in the CISA KEV catalog. Exploitation requires an unauthenticated attacker to entice a user into clicking a malicious link; the attack vector is therefore indirect, relying on social engineering and user interaction. If successful, the attacker gains the ability to run client\u2011side code in the victim\u2019s context."}}}}, "created": "2026-04-22T18:00:05.480024+00:00", "updated": "2026-04-22T18:00:05.480035+00:00", "vendors": []}