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Vulnerability Details :

CVE-2026-1490

Summary
Assigner-Wordfence
Assigner Org ID-b15e7b5b-3da4-40ae-a43c-f7aa60e62599
Published At-15 Feb, 2026 | 02:22
Updated At-15 Feb, 2026 | 02:22
Rejected At-
Credits

Spam protection, Honeypot, Anti-Spam by CleanTalk <= 6.71 - Authorization Bypass via Reverse DNS (PTR record) Spoofing to Unauthenticated Arbitrary Plugin Installation

The Spam protection, Anti-Spam, FireWall by CleanTalk plugin for WordPress is vulnerable to unauthorized Arbitrary Plugin Installation due to an authorization bypass via reverse DNS (PTR record) spoofing on the 'checkWithoutToken' function in all versions up to, and including, 6.71. This makes it possible for unauthenticated attackers to install and activate arbitrary plugins which can be leveraged to achieve remote code execution if another vulnerable plugin is installed and activated. Note: This is only exploitable on sites with an invalid API key.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:Wordfence
Assigner Org ID:b15e7b5b-3da4-40ae-a43c-f7aa60e62599
Published At:15 Feb, 2026 | 02:22
Updated At:15 Feb, 2026 | 02:22
Rejected At:
▼CVE Numbering Authority (CNA)
Spam protection, Honeypot, Anti-Spam by CleanTalk <= 6.71 - Authorization Bypass via Reverse DNS (PTR record) Spoofing to Unauthenticated Arbitrary Plugin Installation

The Spam protection, Anti-Spam, FireWall by CleanTalk plugin for WordPress is vulnerable to unauthorized Arbitrary Plugin Installation due to an authorization bypass via reverse DNS (PTR record) spoofing on the 'checkWithoutToken' function in all versions up to, and including, 6.71. This makes it possible for unauthenticated attackers to install and activate arbitrary plugins which can be leveraged to achieve remote code execution if another vulnerable plugin is installed and activated. Note: This is only exploitable on sites with an invalid API key.

Affected Products
Vendor
cleantalk
Product
Spam protection, Honeypot, Anti-Spam by CleanTalk
Default Status
unaffected
Versions
Affected
  • From * through 6.71 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-350CWE-350 Reliance on Reverse DNS Resolution for a Security-Critical Action
Type: CWE
CWE ID: CWE-350
Description: CWE-350 Reliance on Reverse DNS Resolution for a Security-Critical Action
Metrics
VersionBase scoreBase severityVector
3.19.8CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Version: 3.1
Base score: 9.8
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
finder
Nguyen Ngoc Duc
Timeline
EventDate
Vendor Notified2026-01-27 14:39:01
Disclosed2026-02-14 14:21:19
Event: Vendor Notified
Date: 2026-01-27 14:39:01
Event: Disclosed
Date: 2026-02-14 14:21:19
Replaced By
Rejected Reason
References
HyperlinkResource
https://www.wordfence.com/threat-intel/vulnerabilities/id/cb603be6-4a12-49e1-b8cc-b2062eb97f16?source=cve
N/A
https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/trunk/lib/Cleantalk/ApbctWP/RemoteCalls.php#L69
N/A
https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/trunk/lib/Cleantalk/Common/Helper.php#L64
N/A
https://plugins.trac.wordpress.org/changeset/3454488/cleantalk-spam-protect#file473
N/A
Hyperlink: https://www.wordfence.com/threat-intel/vulnerabilities/id/cb603be6-4a12-49e1-b8cc-b2062eb97f16?source=cve
Resource: N/A
Hyperlink: https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/trunk/lib/Cleantalk/ApbctWP/RemoteCalls.php#L69
Resource: N/A
Hyperlink: https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/trunk/lib/Cleantalk/Common/Helper.php#L64
Resource: N/A
Hyperlink: https://plugins.trac.wordpress.org/changeset/3454488/cleantalk-spam-protect#file473
Resource: N/A
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security@wordfence.com
Published At:15 Feb, 2026 | 04:15
Updated At:15 Feb, 2026 | 04:15

The Spam protection, Anti-Spam, FireWall by CleanTalk plugin for WordPress is vulnerable to unauthorized Arbitrary Plugin Installation due to an authorization bypass via reverse DNS (PTR record) spoofing on the 'checkWithoutToken' function in all versions up to, and including, 6.71. This makes it possible for unauthenticated attackers to install and activate arbitrary plugins which can be leveraged to achieve remote code execution if another vulnerable plugin is installed and activated. Note: This is only exploitable on sites with an invalid API key.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.19.8CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Type: Primary
Version: 3.1
Base score: 9.8
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-350Primarysecurity@wordfence.com
CWE ID: CWE-350
Type: Primary
Source: security@wordfence.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/trunk/lib/Cleantalk/ApbctWP/RemoteCalls.php#L69security@wordfence.com
N/A
https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/trunk/lib/Cleantalk/Common/Helper.php#L64security@wordfence.com
N/A
https://plugins.trac.wordpress.org/changeset/3454488/cleantalk-spam-protect#file473security@wordfence.com
N/A
https://www.wordfence.com/threat-intel/vulnerabilities/id/cb603be6-4a12-49e1-b8cc-b2062eb97f16?source=cvesecurity@wordfence.com
N/A
Hyperlink: https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/trunk/lib/Cleantalk/ApbctWP/RemoteCalls.php#L69
Source: security@wordfence.com
Resource: N/A
Hyperlink: https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/trunk/lib/Cleantalk/Common/Helper.php#L64
Source: security@wordfence.com
Resource: N/A
Hyperlink: https://plugins.trac.wordpress.org/changeset/3454488/cleantalk-spam-protect#file473
Source: security@wordfence.com
Resource: N/A
Hyperlink: https://www.wordfence.com/threat-intel/vulnerabilities/id/cb603be6-4a12-49e1-b8cc-b2062eb97f16?source=cve
Source: security@wordfence.com
Resource: N/A

Change History

0
Information is not available yet

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