CVE-2026-14262
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
References
- 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/AuthenticateService.php#L34
- https://plugins.trac.wordpress.org/browser/simple-jwt-login/tags/3.6.6/src/Services/BaseService.php#L269
- https://plugins.trac.wordpress.org/browser/simple-jwt-login/tags/3.6.6/src/Services/LoginService.php#L62
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3597277%40simple-jwt-login&new=3597277%40simple-jwt-login
- https://www.wordfence.com/threat-intel/vulnerabilities/id/cd97a7a4-9f57-4882-9e3e-0e9853416af9?source=cve
CWEs
CWE-269
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.