CVE-2026-97337 json
Simple Membership <= 4.8.3 - Missing Authorization to Unauthenticated Account Takeover and Sensitive Information Disclosure via 'email' Parameter on Activation Endpoints
published 2026-10-03 37 d ago modified 2026-10-06 33 d ago also EUVD-2026-91908
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 31%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 36 d ago
Exploit prediction
0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected products
- wpinsider-1 Simple Membership
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/ae2b6c4c-7dd6-41e7-8b8d-c09aa7fa660b?source=cve
- plugins.trac.wordpress.org /browser/simple-membership/tags/4.8.3/classes/class.swpm-registration.php#L75
- plugins.trac.wordpress.org /browser/simple-membership/tags/4.8.3/classes/class.swpm-front-registration.php#L850
- plugins.trac.wordpress.org /browser/simple-membership/tags/4.8.3/classes/class.swpm-front-registration.php#L774
- plugins.trac.wordpress.org /browser/simple-membership/tags/4.8.3/classes/class.swpm-init-time-tasks.php#L167
- plugins.trac.wordpress.org /changeset?reponame=&old=3716437%40simple-membership&new=3716437%40simple-membership
Sources
- CVE List CVE-2026-97337
- NVD CVE-2026-97337
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