CVE-2021-24804: Simple JWT Login < 3.2.1 - Arbitrary Settings Update to Site Takeover via CSRF

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-11-17 · updated 2026-06-17
Weakness: CWE-352

Description

The Simple JWT Login WordPress plugin before 3.2.1 does not have nonce checks when saving its settings, allowing attackers to make a logged in admin changed them. Settings such as HMAC verification secret, account registering and default user roles can be updated, which could result in site takeover.

Affected products

Simple JWT Login: before 3.2.1 — fixed in 3.2.1

How to fix

Upgrade to a fixed version: Simple JWT Login 3.2.1. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/6f015e8e-462b-4ef7-a9a1-bb91e7d28e37
https://wpscan.com/vulnerability/6f015e8e-462b-4ef7-a9a1-bb91e7d28e37

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