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WordPress plugin

Anti-Spam by CleanTalk < 5.149 — Authenticated SQL Injection

CVE-2021-24131Published · Updated

Action summary

Affected: <5.149Update to 5.149 or newer

All remediation steps
Watch plugin
Severity
High7.2
CVSS
7.2
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:H Privileges required
High
UI:N User interaction
None
S:U Scope
Unchanged
C:H Confidentiality
High
I:H Integrity
High
A:H Availability
High
Weakness
CWE-89 SQL Injection
Required access
Unknown
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Anti-Spam, Spam FireWall by CleanTalk cleantalk-spam-protect

  1. Affected< 5.149
  2. Patched in5.149

Update to 5.149 or newer.

You are affected if you run < 5.149. Version 5.149 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Anti-Spam, Spam FireWall by CleanTalk.
  • No admin access? Run a passive check of your site. It reads public files only.

What to do

  1. Update to version 5.149, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Anti-Spam, Spam FireWall by CleanTalk to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Nguyen Anh Tien.

Unvalidated input in the Anti-Spam by CleanTalk WordPress plugin, versions before 5.149, lead to multiple authenticated SQL injection vulnerabilities, however, it requires high privilege user (admin+).

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Anti-Spam, Spam FireWall by CleanTalk

All 20
More vulnerabilities in Anti-Spam, Spam FireWall by CleanTalk
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting
≤6.90Update to 6.91
CVE-2026-115673
High7.2Unauthenticated Stored Cross-Site Scripting via 'user_email' Registration Parameter
≤6.89.1Update to 6.90
CVE-2026-109198
Medium5.4Unauthenticated Stored Cross-Site Scripting via Comment Content via ContactsEncoder Greedy Regex
≤6.88Update to 6.89
CVE-2026-103424
Medium6.5Unauthenticated Arbitrary Shortcode Execution
<6.87Update to 6.87
CVE-2026-19855
High7.2Unauthenticated Stored Cross-Site Scripting via Comment Content aria-label Placeholder
≤6.86Update to 6.87
CVE-2026-77830

Same weakness (SQL Injection)

All SQL Injection
Other SQL Injection vulnerabilities
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup≤5.25.25Update to 5.26.45
CVE-2026-120688
Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder≤1.0.2Update to 1.1
CVE-2026-125055
Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System≤3.3.9Update to 3.4.0
CVE-2026-119077
Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce≤5.127.0Update to 5.128.0
CVE-2026-121518

Timeline

  1. CVE published

    Severity high, CVSS 7.2

  2. 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.

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