WP Cerber Security <= 9.4 — IP Protection Bypass
CVE-2022-4100Published · Updated Action summary
Affected: ≤9.4Update to 9.5 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?
WP Cerber Security, Anti-spam & Malware Scan wp-cerber
- Affected≤ 9.4
- Patched in9.5
Update to 9.5 or newer.
You are affected if you run ≤ 9.4. Version 9.5 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under WP Cerber Security, Anti-spam & Malware Scan.
- 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 9.5, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch WP Cerber Security, Anti-spam & Malware Scan to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to chihyu.
The WP Cerber Security plugin for WordPress is vulnerable to IP Protection bypass in versions up to, and including 9.4 due to the plugin improperly checking for a visitor's IP address. This makes it possible for an attacker whose IP address has been blocked to bypass this control by setting the X-Forwarded-For: HTTP header to an IP Address that hasn't been blocked.
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 WP Cerber Security, Anti-spam & Malware Scan
All 9| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting ≤9.1Update to 9.2 | CVE-2022-4712 | |
| Medium5.3 | User Enumeration Bypass via REST API ≤9.3.2Update to 9.3.3 | CVE-2022-4417 | |
| Medium5.3 | User Enumeration Bypass ≤9.0Update to 9.1 | CVE-2022-2939 | |
| Medium5.5 | Authenticated (Admin+) Stored Cross-Site Scripting ≤9.0Update to 9.1 | — | |
| High7.2 | Unauthenticated Stored Cross-Site Scripting ≤8.9.5.2Update to 8.9.6 | CVE-2022-0429 |
- High7.2Unauthenticated Stored Cross-Site Scripting
≤9.1Update to 9.2
- Medium5.3User Enumeration Bypass via REST API
≤9.3.2Update to 9.3.3
- Medium5.3User Enumeration Bypass
≤9.0Update to 9.1
- Medium5.5Authenticated (Admin+) Stored Cross-Site Scripting
≤9.0Update to 9.1
- High7.2Unauthenticated Stored Cross-Site Scripting
≤8.9.5.2Update to 8.9.6
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.