Login with OTP <= 1.6 - Unauthenticated Authentication Bypass via OTP Brute Force
Summary
| CVE | CVE-2026-8760 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-27 07:16:14 UTC |
| Updated | 2026-05-27 14:50:47 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 9.8 CRITICAL from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.002510000 probability, percentile 0.485170000 (date 2026-05-27)
Problem Types: CWE-307 | CWE-307 CWE-307 Improper Restriction of Excessive Authentication Attempts
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | India-web-developer | Login With OTP | affected <= 1.6 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| plugins.trac.wordpress.org/browser/otp-login/trunk/lib/otpl-class.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/otp-login/tags/1.6/lib/otpl-class.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/otp-login/trunk/lib/otpl-class.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/otp-login/trunk/lib/otpl-class.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/otp-login/trunk/lib/otpl-class.php | [email protected] | plugins.trac.wordpress.org | |
| nvd.nist.gov/vuln/detail/CVE-2024-11178 | [email protected] | nvd.nist.gov | |
| www.wordfence.com/threat-intel/vulnerabilities/id/ad22cb24-e6a0-456f-afe8-88a39... | [email protected] | www.wordfence.com | |
| plugins.trac.wordpress.org/browser/otp-login/tags/1.6/lib/otpl-class.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/otp-login/tags/1.6/lib/otpl-class.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/otp-login/tags/1.6/lib/otpl-class.php | [email protected] | plugins.trac.wordpress.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Irwan Kusuma (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-05-26T17:20:31.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.