Description
The SMS Alert – SMS & OTP for WooCommerce, Order Notifications & Abandoned Cart Recovery plugin for WordPress is vulnerable to Authentication Bypass leading to Account Takeover in all versions up to, and including, 3.9.7 via the `billing_phone` parameter. This is due to the `processRegistration()` function using a phone-unbound `$_SESSION['sa_mobile_verified']` boolean flag as the sole gate before issuing an authentication cookie — the flag is set to `true` after any successful OTP validation without being bound to the specific phone number that was verified. This makes it possible for unauthenticated attackers to complete OTP verification for a phone number they control, then resubmit the registration request with a victim's `billing_phone` value to have `wp_set_auth_cookie()` called for the resolved victim account, enabling full authentication as any existing WordPress user whose registered phone number is known or guessable, including administrators.
References7
- plugins.trac.wordpress.org/browser/sms-alert/tags/3.9.6/handler…
- plugins.trac.wordpress.org/browser/sms-alert/tags/3.9.6/handler…
- plugins.trac.wordpress.org/browser/sms-alert/tags/3.9.6/handler…
- plugins.trac.wordpress.org/browser/sms-alert/tags/3.9.6/handler…
- plugins.trac.wordpress.org/browser/sms-alert/tags/3.9.6/handler…
- plugins.trac.wordpress.org/changeset?reponame=&old=3623914%40sm…
- www.wordfence.com/threat-intel/vulnerabilities/id/661d4ea9-572d…
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 60 · as of 13 November 2026
- CWE
- CWE-288
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