EUVD-2026-43145
GHSA-4f4m-2qm7-575f
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V8 - Authorization Least privilege enforcement
MITRE ATT&CK
1 technique across 1 tactic: Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
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Alert meAnalysisAIv1 – Jul 11, 2026
Privilege escalation in the Simple JWT Login WordPress plugin (all versions through 3.6.6) lets an authenticated subscriber-level user forge an Administrator session by injecting arbitrary identity claims into the JWT payload. Because AuthenticateService::generatePayload() only overwrites payload keys that appear in the admin-configured jwt_payload allowlist, attacker-supplied claims such as email, id, or username survive and are signed with the site's HS256 secret; the token is then redeemed at /autologin to log in as any administrator. Reported by Wordfence with no public exploit identified at time of analysis and no CISA KEV listing.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
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Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from Vendor (Wordfence) · only source for this CVE.
CVSS VectorVendor: Wordfence
DescriptionCVE.org
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.
Articles & Coverage 1
Executive ViewAI
The Simple JWT Login WordPress plugin (versions through 3.6.6) enables authenticated users to hijack administrator accounts, creating a critical access control risk for WordPress sites using this extension. Organizations relying on this plugin face potential site takeover and unauthorized access to sensitive content and user data.
24 hours: Deactivate the Simple JWT Login plugin immediately, or block access to the /autologin endpoint via firewall rules if the plugin provides critical functionality. 7 days: Audit all WordPress administrator accounts and user logs for unauthorized access or suspicious authentications since plugin installation; document findings for forensic investigation. 30 days: Permanently remove the plugin and migrate to an alternative authentication method; monitor the plugin vendor for a security patch release and update immediately when available.
No vendor-released patch identified at time of analysis. Interim mitigations: (1) Immediately deactivate the plugin; (2) If plugin functionality is operationally critical, implement WAF rules to restrict /autologin endpoint to whitelisted IP ranges only; (3) Enable detailed logging for all JWT token activity and review logs daily for anomalies; (4) Conduct immediate administrative account audit to identify and remove unauthorized privilege escalations; (5) If JWT authentication is required, evaluate alternative JWT libraries that do not exhibit this payload injection vulnerability.
Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
Privilege escalation occurs when an attacker leverages flaws in access control mechanisms to gain permissions beyond what they were originally granted.
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