{"id":"CVE-2026-14262","state":"PUBLISHED","title":"Simple JWT Login <= 3.6.6 - Authenticated (Subscriber+) Authentication Bypass to Privilege Escalation via 'payload' Parameter","description":"The Simple JWT Login – Allows you to use JWT on REST endpoints. plugin for WordPress is vulnerable to Authentication Bypass to Privilege Escalation in all versions up to, and including, 3.6.6 via the `payload` parameter. The vulnerability exists because `AuthenticateService::generatePayload()` only overwrites JWT payload keys whose names appear in the admin-configured `jwt_payload` list — leaving any attacker-supplied identity claims such as `email`, `id`, or `username` intact and signed into the JWT with the site's HS256 secret. This makes it possible for authenticated attackers, with subscriber-level access and above, to escalate their privileges to that of an Administrator by injecting a target administrator's email address into the `payload` parameter at the `/wp-json/simple-jwt-login/v1/auth` endpoint, then redeeming the resulting JWT at the `/autologin` endpoint to obtain a fully authenticated session as that administrator.","publishedAt":"2026-07-11T03:44:25.497Z","updatedAt":"2026-07-13T17:37:15.584Z","severity":{"score":8.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Wordfence"},"assigner":"Wordfence","products":["nicu_m Simple JWT Login – Allows you to use JWT on REST endpoints."],"affected":[{"vendor":"nicu_m","product":"Simple JWT Login – Allows you to use JWT on REST endpoints.","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"3.6.6","versionType":"semver"}]}],"references":["https://www.wordfence.com/threat-intel/vulnerabilities/id/cd97a7a4-9f57-4882-9e3e-0e9853416af9?source=cve","https://plugins.trac.wordpress.org/browser/simple-jwt-login/tags/3.6.6/src/Services/AuthenticateService.php#L34","https://plugins.trac.wordpress.org/browser/simple-jwt-login/tags/3.6.6/src/Services/AuthenticateService.php#L163","https://plugins.trac.wordpress.org/browser/simple-jwt-login/tags/3.6.6/src/Services/LoginService.php#L62","https://plugins.trac.wordpress.org/browser/simple-jwt-login/tags/3.6.6/src/Services/BaseService.php#L269","https://plugins.trac.wordpress.org/changeset?reponame=&old=3597277%40simple-jwt-login&new=3597277%40simple-jwt-login"],"weaknesses":["CWE-269"],"ingestedAt":"2026-10-29T20:11:00.674Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/14xxx/CVE-2026-14262.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-14262","state":"PUBLISHED","datePublished":"2026-07-11T03:44:25.497Z","dateUpdated":"2026-07-13T17:37:15.584Z","assignerShortName":"Wordfence","assignerOrgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateReserved":"2026-06-30T17:21:39.776Z"},"containers":{"cna":{"title":"Simple JWT Login <= 3.6.6 - Authenticated (Subscriber+) Authentication Bypass to Privilege Escalation via 'payload' Parameter","descriptions":[{"lang":"en","value":"The Simple JWT Login – Allows you to use JWT on REST endpoints. plugin for WordPress is vulnerable to Authentication Bypass to Privilege Escalation in all versions up to, and including, 3.6.6 via the `payload` parameter. The vulnerability exists because `AuthenticateService::generatePayload()` only overwrites JWT payload keys whose names appear in the admin-configured `jwt_payload` list — leaving any attacker-supplied identity claims such as `email`, `id`, or `username` intact and signed into the JWT with the site's HS256 secret. This makes it possible for authenticated attackers, with subscriber-level access and above, to escalate their privileges to that of an Administrator by injecting a target administrator's email address into the `payload` parameter at the `/wp-json/simple-jwt-login/v1/auth` endpoint, then redeeming the resulting JWT at the `/autologin` endpoint to obtain a fully authenticated session as that administrator."}],"affected":[{"vendor":"nicu_m","product":"Simple JWT Login – Allows you to use JWT on REST endpoints.","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"3.6.6","versionType":"semver"}]}],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/cd97a7a4-9f57-4882-9e3e-0e9853416af9?source=cve"},{"url":"https://plugins.trac.wordpress.org/browser/simple-jwt-login/tags/3.6.6/src/Services/AuthenticateService.php#L34"},{"url":"https://plugins.trac.wordpress.org/browser/simple-jwt-login/tags/3.6.6/src/Services/AuthenticateService.php#L163"},{"url":"https://plugins.trac.wordpress.org/browser/simple-jwt-login/tags/3.6.6/src/Services/LoginService.php#L62"},{"url":"https://plugins.trac.wordpress.org/browser/simple-jwt-login/tags/3.6.6/src/Services/BaseService.php#L269"},{"url":"https://plugins.trac.wordpress.org/changeset?reponame=&old=3597277%40simple-jwt-login&new=3597277%40simple-jwt-login"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-269","lang":"en","description":"CWE-269 Improper Privilege Management","type":"CWE"}]}],"providerMetadata":{"shortName":"Wordfence","orgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateUpdated":"2026-07-11T03:44:25.497Z"},"credits":[{"lang":"en","type":"finder","value":"Navapon Premkasem (71C4)"}],"timeline":[{"time":"2026-07-10T15:02:36.000Z","lang":"en","value":"Disclosed"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-13T17:36:58.883199Z","id":"CVE-2026-14262","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-13T17:37:15.584Z"}}]}}}