CVE-2021-24131Public exploitNetwork attack vector

Admin-level database manipulation via unsanitized spam IDs

Published Mar 18, 2021 · Updated Aug 3, 2024

SQL injection in CleanTalk Anti-Spam by CleanTalk before 5.149 allows remote authenticated users to manipulate the WordPress database. The removeLogs and removeSpam functions in lib/Cleantalk/ApbctWP/FindSpam/ListTable/Users.php place attacker-controlled spamids values into SQL without validating them as numeric identifiers. Administrator access to the Check Users page and a valid request nonce are required; crafted deletion requests can alter query execution and affect stored data.

CVSS severity7.2
High
EPSS probability1.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in CleanTalk Anti-Spam by CleanTalk before 5.149 allows remote authenticated users to manipulate the WordPress database. The removeLogs and removeSpam functions in lib/Cleantalk/ApbctWP/FindSpam/ListTable/Users.php place attacker-controlled spamids values into SQL without validating them as numeric identifiers. Administrator access to the Check Users page and a valid request nonce are required; crafted deletion requests can alter query execution and affect stored data.

The record

CVE
CVE-2021-24131
Published
Mar 18, 2021
Updated
Aug 3, 2024
Vendor
CleanTalk
Product
Anti-Spam by CleanTalk
Classifications
CWE-89, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 18, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.149 <5.149

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

CleanTalk · Anti-Spam by CleanTalkversion=5.149 <5.149

Published CVSS scores

7.2WordfenceCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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