What’s Vulnerable › Vulnerabilities
CVE-2026-8760: Login with OTP <= 1.6 - Unauthenticated Authentication Bypass via OTP Brute Force
- Severity: critical (CVSS 9.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.6% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-05-27 · updated 2026-06-17
- Weakness: CWE-307
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.
Affected products
- india-web-developer Login with OTP: through 1.6
References
- https://nvd.nist.gov/vuln/detail/CVE-2024-11178
- https://plugins.trac.wordpress.org/browser/otp-login/tags/1.6/lib/otpl-class.php#L361
- https://plugins.trac.wordpress.org/browser/otp-login/tags/1.6/lib/otpl-class.php#L419
- https://plugins.trac.wordpress.org/browser/otp-login/tags/1.6/lib/otpl-class.php#L424
- https://plugins.trac.wordpress.org/browser/otp-login/tags/1.6/lib/otpl-class.php#L427
- https://plugins.trac.wordpress.org/browser/otp-login/trunk/lib/otpl-class.php#L361
- https://plugins.trac.wordpress.org/browser/otp-login/trunk/lib/otpl-class.php#L419
- https://plugins.trac.wordpress.org/browser/otp-login/trunk/lib/otpl-class.php#L424
- https://plugins.trac.wordpress.org/browser/otp-login/trunk/lib/otpl-class.php#L427
- https://www.wordfence.com/threat-intel/vulnerabilities/id/ad22cb24-e6a0-456f-afe8-88a39acd97d3?source=cve
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