CVE-2026-8760CWE-307

Login with OTP <= 1.6 - Unauthenticated Authentication Bypass via OTP Brute Force

Critical · published May 27, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
64.6
In the wild
Unconfirmed
What it is

The Login with OTP plugin for WordPress is vulnerable to authentication bypass in all versions up to, and including, 1.6. This is due to an incomplete fix for CVE-2024-11178: the rate-limit/lockout check added to `otpl_login_action()` was placed only inside the OTP-generation branch and is never evaluated on the OTP-validation branch, and the generated 6-digit OTP additionally has no expiration. This makes it possible for unauthenticated attackers to brute-force the 900,000-value OTP space for any user account (including administrators) and obtain a valid `wp_set_auth_cookie()` session, leading to full site compromise.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01071 · 64.6th percentile
Weakness
CWE-307 · Improper Restriction of Excessive Authentication Attempts
Published
2026-05-27T05:31Z
EPSS history
Timeline
  • 27 MAY 05:31Z
    Login with OTP <= 1.6 - Unauthenticated Authentication Bypass via OTP Brute Force
    cvelistv5