Description
The Simple Membership plugin for WordPress is vulnerable to unauthorized modification of data and sensitive information disclosure in versions up to, and including, 4.8.3 via the resend-activation and email-activation endpoints. The endpoints are dispatched from SwpmInitTimeTasks::check_and_do_email_activation() on frontend init with no authentication, nonce, capability, or ownership check, and the recipient address used by SwpmRegistration::send_reg_email() is taken from an attacker-controlled $_POST['email'] parameter (overriding the member's registered address). This makes it possible for unauthenticated attackers to redirect an arbitrary pending member's activation email — and the follow-up 'registration complete' email containing the member's username and plaintext password — to an attacker-chosen address, and to then activate that member's account without their consent.
References6
- plugins.trac.wordpress.org/browser/simple-membership/tags/4.8.3…
- plugins.trac.wordpress.org/browser/simple-membership/tags/4.8.3…
- plugins.trac.wordpress.org/browser/simple-membership/tags/4.8.3…
- plugins.trac.wordpress.org/browser/simple-membership/tags/4.8.3…
- plugins.trac.wordpress.org/changeset?reponame=&old=3716437%40si…
- www.wordfence.com/threat-intel/vulnerabilities/id/ae2b6c4c-7dd6…
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - EPSS — exploit probability
- 0% percentile: 32 · as of 10 November 2026
- CWE
- CWE-862
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