Simple JWT Login <= 3.2.1 — Insecure Password Creation
CVE-2021-24998Published · Updated Action summary
Affected: <3.3.0Update to 3.3.0 or newer
All remediation steps- Severity
- High7.5
- CVSS
- 7.5CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:NConfidentiality- None
I:HIntegrity- High
A:NAvailability- None
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Simple JWT Login – Allows you to use JWT on REST endpoints. simple-jwt-login
- Affected< 3.3.0
- Patched in3.3.0
Update to 3.3.0 or newer.
You are affected if you run < 3.3.0. Version 3.3.0 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Simple JWT Login – Allows you to use JWT on REST endpoints..
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 3.3.0, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Simple JWT Login – Allows you to use JWT on REST endpoints. to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Zian Choy.
The Simple JWT Login WordPress plugin before 3.3.0 can be used to create new WordPress user accounts with a randomly generated password. The password is generated using the str_shuffle PHP function that "does not generate cryptographically secure values, and should not be used for cryptographic purposes" according to PHP's documentation.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Simple JWT Login – Allows you to use JWT on REST endpoints.
All 6| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium4.3 | Missing Authorization 4.0.0 – 4.0.0No patch available | CVE-2026-39793 | |
| High7.3 | Unauthenticated Privilege Escalation <3.6.8Update to 3.6.8 | CVE-2026-19714 | |
| High8.8 | Authenticated (Subscriber+) Authentication Bypass to Privilege Escalation via 'payload' Parameter ≤3.6.6Update to 3.6.7 | CVE-2026-14262 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting ≤3.6.4Update to 3.6.5 | CVE-2025-58648 | |
| High8.8 | Cross-Site Request Forgery <3.2.1Update to 3.2.1 | CVE-2021-24804 |
- Medium4.3Missing Authorization
4.0.0 – 4.0.0No patch available
- High7.3Unauthenticated Privilege Escalation
<3.6.8Update to 3.6.8
- High8.8Authenticated (Subscriber+) Authentication Bypass to Privilege Escalation via 'payload' Parameter
≤3.6.6Update to 3.6.7
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤3.6.4Update to 3.6.5
- High8.8Cross-Site Request Forgery
<3.2.1Update to 3.2.1
Timeline
CVE published
Severity high, CVSS 7.5
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.