CVE-2023-40606Network attack vector

Administrator code execution via undisclosed injection

Published Dec 29, 2023 · Updated Apr 28, 2026

Code injection in Kanban Boards for WordPress 2.5.21 and earlier allows remote authenticated users to execute code on the server. The CNA record and its referenced advisory do not disclose the affected file, function, input, or unsafe code-generation operation. Administrator access is required; successful exploitation grants arbitrary server-side code execution.

CVSS severity9.1
Critical
EPSS probability0.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Kanban Boards for WordPress 2.5.21 and earlier allows remote authenticated users to execute code on the server. The CNA record and its referenced advisory do not disclose the affected file, function, input, or unsafe code-generation operation. Administrator access is required; successful exploitation grants arbitrary server-side code execution.

The record

CVE
CVE-2023-40606
Published
Dec 29, 2023
Updated
Apr 28, 2026
Vendor
Kanban for WordPress
Product
Kanban Boards for WordPress
Classifications
CWE-94, T1059
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Dec 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=n/a <=2.5.21

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Kanban for WordPress · Kanban Boards for WordPressversion=n/a <=2.5.21

Published CVSS scores

9.1PatchstackCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
7.2NVDCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

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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