CVE-2026-88785: Unknown Simple Membership

Medium severity, CVSS 4.7. EPSS: 0.1% chance of exploitation in the next 30 days.

The Simple Membership WordPress plugin before 4.8.3 does not avoid transmitting a newly registered member's plaintext password in a URL query string when an optional auto-login-after-registration feature is enabled, exposing the credential in browser history and in web server, proxy, and CDN access logs to anyone able to read them.

Affected products

• Unknown Simple Membership: before 4.8.3 (fixed in 4.8.3)

Published 2026-10-11. Last modified 2026-10-13.