CVE-2021-24804: The Simple JWT Login WordPress plugin before 3.2.1 does not have nonce checks when saving its settings, allowi

Q: How do I fix CVE-2021-24804?

simple jwt login: upgrade to 3.2.1. Exact commands for each OS are on this page.

Q: Is CVE-2021-24804 being exploited?

CVE-2021-24804 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-24804 affect?

CVE-2021-24804 affects simple jwt login. Severity is high (CVSS 8.8). 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 us

Q: How urgent is CVE-2021-24804?

Priority 48/100. High severity; Public exploit reference

This month

HIGH 8.8UPGRADE

CVE-2021-24804 is a high-severity flaw (CVSS 8.8) affecting simple jwt login. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.6% (top 50%)
CISA exploited list	No
Weakness	CWE-352
Published	2021-11-17
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: simple jwt login project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-11-17 11:15 UTCPublished CVE record published
2026-06-17 03:40 UTCUpdated Record last modified

simple jwt login project simple jwt login UPGRADE

Affected: < 3.2.1

Fixed in: 3.2.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy simple-jwt-login || rpm -q simple-jwt-login || simple-jwt-login --version

2. UPGRADE to 3.2.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade simple-jwt-login

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade simple-jwt-login

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-24804?

simple jwt login: upgrade to 3.2.1. Exact commands for each OS are on this page.

Is CVE-2021-24804 being exploited?

CVE-2021-24804 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-24804 affect?

CVE-2021-24804 affects simple jwt login. Severity is high (CVSS 8.8). 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 us

How urgent is CVE-2021-24804?

Priority 48/100. High severity; Public exploit reference

Software pages

WordPress vulnerabilities

Related CVEs

CVE-2021-24998 HIGH 7.5 UPGRADE The Simple JWT Login WordPress plugin before 3.3.0 can be used to create new WordPress user accounts with a ra

References

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