CVE-2026-15206: Unknown Sms Alert

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

The SMS Alert WordPress plugin before 3.9.8 does not bind its "mobile verified" session flag to the phone number that was actually verified: after an attacker verifies an OTP sent to their own phone, the signup/login handler reads a fresh, attacker-supplied phone number to select the account and logs them in. An unauthenticated attacker can therefore log in as any user, including an administrator, who has a billing phone on file.

Affected products

• Unknown Sms Alert: before 3.9.8 (fixed in 3.9.8)

Published 2026-08-02. Last modified 2026-08-26.