CVE-2026-8760 json
Login with OTP <= 1.6 - Unauthenticated Authentication Bypass via OTP Brute Force
published 2026-05-27 5 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-32084
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 63%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 5 mo ago
Exploit prediction
1.03% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- india-web-developer Login with OTP
Classification
- Weakness
-
- CWE-307 Improper Restriction of Excessive Authentication Attempts
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/ad22cb24-e6a0-456f-afe8-88a39acd97d3?source=cve
- plugins.trac.wordpress.org /browser/otp-login/tags/1.6/lib/otpl-class.php#L419
- plugins.trac.wordpress.org /browser/otp-login/trunk/lib/otpl-class.php#L419
- plugins.trac.wordpress.org /browser/otp-login/tags/1.6/lib/otpl-class.php#L424
- plugins.trac.wordpress.org /browser/otp-login/trunk/lib/otpl-class.php#L424
- plugins.trac.wordpress.org /browser/otp-login/tags/1.6/lib/otpl-class.php#L427
- plugins.trac.wordpress.org /browser/otp-login/trunk/lib/otpl-class.php#L427
- plugins.trac.wordpress.org /browser/otp-login/tags/1.6/lib/otpl-class.php#L361
- plugins.trac.wordpress.org /browser/otp-login/trunk/lib/otpl-class.php#L361
- nvd.nist.gov /vuln/detail/CVE-2024-11178
Sources
- CVE List CVE-2026-8760
- NVD CVE-2026-8760
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.