CVE-2026-8760 | Login with OTP <= 1.6 - Unauthenticated Authentication Bypass via OTP Brute Force

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.

Published: 2026-05-27 Last update: 2026-05-27 Assigner: [email protected] Source: [email protected]

Conclusion & alert: CVE-2026-8760 is rated Moderate Risk (56.2/100): CVSS Critical severity, with low exploitation likelihood (EPSS 0.25%). Mandatory action: Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-8760

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-27 0.25%

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-8760

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
3.9 5.9 [email protected]

Weakness enumeration for CVE-2026-8760

GitHub Security Advisory for CVE-2026-8760

GHSA-cq2x-2xjr-vm5v · Severity: critical — The Login with OTP plugin for WordPress is vulnerable to authentication bypass in all versions up...

Affected software / configurations for CVE-2026-8760

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2026-8760

URL Tags
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
cvelogic Threat Intelligence