PT-2026-57390 · Nicu M · Simple Jwt Login – Allows You To Use Jwt On Rest Endpoints.
Navapon Premkasem
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Published
2026-07-11
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Updated
2026-07-11
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CVE-2026-14262
CVSS v3.1
8.8
High
| Vector | AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
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.Fix
Improper Privilege Management
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Weakness Enumeration
Related Identifiers
Affected Products
Simple Jwt Login – Allows You To Use Jwt On Rest Endpoints.