WordPress plugin
WP Cerber < 8.9.3 — Access Bypass Control
CVE-2021-37598Published · Updated Action summary
Affected: <8.9.3Update to 8.9.3 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:L/I:N/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:LConfidentiality- Low
I:NIntegrity- None
A:NAvailability- None
- Weakness
- CWE-284 Improper Access Control
- 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< 8.9.3
- Patched in8.9.3
Update to 8.9.3 or newer.
You are affected if you run < 8.9.3. Version 8.9.3 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 8.9.3, 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 Aaron Carreras.
WP Cerber before 8.9.3 allows bypass of /wp-json access control via a trailing ? character.
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 |
|---|---|---|---|
| Medium5.3 | IP Protection Bypass ≤9.4Update to 9.5 | CVE-2022-4100 | |
| 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 | — |
- Medium5.3IP Protection Bypass
≤9.4Update to 9.5
- 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
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.