CVE-2026-8760

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

Published May 27, 2026 CVSS 3.1 · 9.8 Critical EPSS 1.0% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared India-web-developer
India-web-developer login With Otp
Wordpress
Wordpress wordpress
Vendors & Products India-web-developer
India-web-developer login With Otp
Wordpress
Wordpress wordpress
Type Values Removed Values Added
Description 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.
Title Login with OTP <= 1.6 - Unauthenticated Authentication Bypass via OTP Brute Force
Weaknesses CWE-307
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Wordfence
Published
Updated
May 27, 2026, 10:33 AM
Reserved
May 16, 2026, 6:34 PM
Status
Deferred
Published
May 27, 2026, 7:16 AM
Modified
Jun 17, 2026, 11:04 AM