Is CVE-2026-6203 actively exploited?

No active exploitation of CVE-2026-6203 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-6203 be exploited remotely?

Yes. CVE-2026-6203 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-6203?

CVE-2026-6203 has a CVSS score of 6.1 (MEDIUM).

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MEDIUM

CVE-2026-6203

CWE-601Published: April 13, 2026· Updated: Apr 13, 2026

6.1

CVSS v3.1

EPSS:1.19%probability of exploitation in 30 daysPercentile:78.9th

Official Description

The User Registration & Membership plugin for WordPress is vulnerable to Open Redirect in versions up to and including 5.1.4. This is due to insufficient validation of user-supplied URLs passed via the 'redirect_to_on_logout' GET parameter before redirecting users. The `redirect_to_on_logout` GET parameter is passed directly to WordPress's `wp_redirect()` function instead of the domain-restricted `wp_safe_redirect()`. While `esc_url_raw()` is applied to sanitize malformed URLs, it does not restrict the redirect destination to the local domain, allowing an attacker to craft a specially formed link that redirects users to potentially malicious external URLs after logout, which could be used to facilitate phishing attacks.

NVD Source

Technical Analysis

CVE-2026-6203 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.