Answer in brief
CVE-2026-97337 records a High severity (CVSS 7.5) vulnerability in Simple Membership <= 4.8.3 - Missing Authorization to Unauthenticated Account Takeover and Sensitive Information Disclosure via 'email' Parameter on Activation Endpoints. The current sources do not mark it as known exploited. The current feed maps wpinsider-1/Simple Membership (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps wpinsider-1/Simple Membership (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| wpinsider-1/Simple Membershipgeneric | >=0 <=4.8.3 | Not reported |
Published upstream
Oct 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 3, 2026
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.
Quoted source text, attributed separately from HOL analysis.