Limit Login Attempts Security – Login Security, 2FA, Firewall, Brute Force Prevention < 3.3.5 — Unauthenticated Username Denylist Bypass
CVE-2026-18356Published · Updated Action summary
Affected: <3.3.5Update to 3.3.5 or newer
All remediation steps- Severity
- Medium5.3
- CVSS
- 5.3CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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:LIntegrity- Low
A:NAvailability- None
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Limit Login Attempts Security – Brute Force Protection, 2FA, Firewall & Login Security limit-login-attempts-reloaded
- Affected< 3.3.5
- Patched in3.3.5
Update to 3.3.5 or newer.
You are affected if you run < 3.3.5. Version 3.3.5 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Limit Login Attempts Security – Brute Force Protection, 2FA, Firewall & Login Security.
- 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 3.3.5, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Limit Login Attempts Security – Brute Force Protection, 2FA, Firewall & Login Security to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Artus KG.
The Limit Login Attempts Security – Login Security, 2FA, Firewall, Brute Force Prevention plugin for WordPress is vulnerable to protection mechanism bypass in all versions up to 3.3.5 (exclusive). This makes it possible for unauthenticated attackers to use usernames that have been added to a denylist.
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 Limit Login Attempts Security – Brute Force Protection, 2FA, Firewall & Login Security
All 6| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium5.5 | Authenticated (Administrator+) Server-Side Request Forgery <3.4.2Update to 3.4.2 | CVE-2026-118439 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode ≤2.25.26Update to 2.25.27 | CVE-2023-6934 | |
| Medium4.3 | Missing Authorization ≤2.25.25Update to 2.25.26 | CVE-2023-5525 | |
| High7.3 | Login Rate Limiting Bypass ≤2.17.3Update to 2.17.4 | CVE-2020-35590 | |
| Medium6.1 | Reflected Cross-Site Scripting ≤2.15.2Update to 2.17.4 | CVE-2020-35589 |
- Medium5.5Authenticated (Administrator+) Server-Side Request Forgery
<3.4.2Update to 3.4.2
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode
≤2.25.26Update to 2.25.27
- Medium4.3Missing Authorization
≤2.25.25Update to 2.25.26
- High7.3Login Rate Limiting Bypass
≤2.17.3Update to 2.17.4
- Medium6.1Reflected Cross-Site Scripting
≤2.15.2Update to 2.17.4
Timeline
CVE published
Severity medium, CVSS 5.3
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.