WordPress Zero Spam <= 2.1.1 — SQL Injection
af7345f9-6f62-424b-b02d-c145a90508aePublished · Updated Action summary
Affected: ≤2.1.1Update to 2.2.0 or newer
All remediation steps- Severity
- Critical9.8
- CVSS
- 9.8CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:HConfidentiality- High
I:HIntegrity- High
A:HAvailability- High
- Weakness
- CWE-89 SQL Injection
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Zero Spam for WordPress zero-spam
- Affected≤ 2.1.1
- Patched in2.2.0
Update to 2.2.0 or newer.
You are affected if you run ≤ 2.1.1. Version 2.2.0 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Zero Spam for WordPress.
- 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 2.2.0, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Zero Spam for WordPress to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to thiagolcks.
The WordPress Zero Spam plugin for WordPress is vulnerable to Blind SQL Injection in versions up to, and including, 2.1.1 due to insufficient escaping on the user supplied Client-IP header parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.
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
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| High7.2 | Authenticated(Administrator+) SQL Injection <5.4.5Update to 5.4.5 | — |
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Same weakness (SQL Injection)
All SQL Injection| Severity | Vulnerability | CVE | Published |
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| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission | CVE-2026-125055 | |
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Timeline
CVE published
Severity critical, CVSS 9.8
Record last updated
Sources & licenses
- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- 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.