{"id":"CVE-2026-8760","state":"PUBLISHED","title":"Login with OTP <= 1.6 - Unauthenticated Authentication Bypass via OTP Brute Force","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.","publishedAt":"2026-05-27T05:31:29.863Z","updatedAt":"2026-05-27T10:33:35.523Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"Wordfence"},"assigner":"Wordfence","products":["india-web-developer Login with OTP"],"affected":[{"vendor":"india-web-developer","product":"Login with OTP","defaultStatus":"unaffected","versions":[{"version":"<= 1.6","status":"affected"}]}],"references":["https://www.wordfence.com/threat-intel/vulnerabilities/id/ad22cb24-e6a0-456f-afe8-88a39acd97d3?source=cve","https://plugins.trac.wordpress.org/browser/otp-login/tags/1.6/lib/otpl-class.php#L419","https://plugins.trac.wordpress.org/browser/otp-login/trunk/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/trunk/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#L427","https://plugins.trac.wordpress.org/browser/otp-login/tags/1.6/lib/otpl-class.php#L361","https://plugins.trac.wordpress.org/browser/otp-login/trunk/lib/otpl-class.php#L361","https://nvd.nist.gov/vuln/detail/CVE-2024-11178"],"weaknesses":["CWE-307"],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/8xxx/CVE-2026-8760.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-8760","state":"PUBLISHED","datePublished":"2026-05-27T05:31:29.863Z","dateUpdated":"2026-05-27T10:33:35.523Z","assignerShortName":"Wordfence","assignerOrgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateReserved":"2026-05-16T18:34:47.484Z"},"containers":{"cna":{"title":"Login with OTP <= 1.6 - Unauthenticated Authentication Bypass via OTP Brute Force","descriptions":[{"lang":"en","value":"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":[{"vendor":"india-web-developer","product":"Login with OTP","defaultStatus":"unaffected","versions":[{"version":"<= 1.6","status":"affected"}]}],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/ad22cb24-e6a0-456f-afe8-88a39acd97d3?source=cve"},{"url":"https://plugins.trac.wordpress.org/browser/otp-login/tags/1.6/lib/otpl-class.php#L419"},{"url":"https://plugins.trac.wordpress.org/browser/otp-login/trunk/lib/otpl-class.php#L419"},{"url":"https://plugins.trac.wordpress.org/browser/otp-login/tags/1.6/lib/otpl-class.php#L424"},{"url":"https://plugins.trac.wordpress.org/browser/otp-login/trunk/lib/otpl-class.php#L424"},{"url":"https://plugins.trac.wordpress.org/browser/otp-login/tags/1.6/lib/otpl-class.php#L427"},{"url":"https://plugins.trac.wordpress.org/browser/otp-login/trunk/lib/otpl-class.php#L427"},{"url":"https://plugins.trac.wordpress.org/browser/otp-login/tags/1.6/lib/otpl-class.php#L361"},{"url":"https://plugins.trac.wordpress.org/browser/otp-login/trunk/lib/otpl-class.php#L361"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-11178"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-307","lang":"en","description":"CWE-307 Improper Restriction of Excessive Authentication Attempts","type":"CWE"}]}],"providerMetadata":{"shortName":"Wordfence","orgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateUpdated":"2026-05-27T05:31:29.863Z"},"credits":[{"lang":"en","type":"finder","value":"Irwan Kusuma"}],"timeline":[{"time":"2026-05-26T17:20:31.000Z","lang":"en","value":"Disclosed"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-27T10:16:57.459209Z","id":"CVE-2026-8760","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-27T10:33:35.523Z"}}]}}}