CVE-2023-23640Network attack vector

Subscriber-level plugin activation via missing authorization checks

Published Jun 9, 2024 · Updated Apr 28, 2026

Missing authorization in MainWP UpdraftPlus Extension 4.0.6 and earlier allows remote authenticated users to activate arbitrary plugins. The public advisory identifies missing authorization and nonce-token validation in a privileged plugin action but does not name the affected endpoint or function. Subscriber-level access is required, and successful exploitation changes which plugins run on the Dashboard, affecting confidentiality and integrity without a reported service interruption.

CVSS severity5.4
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in MainWP UpdraftPlus Extension 4.0.6 and earlier allows remote authenticated users to activate arbitrary plugins. The public advisory identifies missing authorization and nonce-token validation in a privileged plugin action but does not name the affected endpoint or function. Subscriber-level access is required, and successful exploitation changes which plugins run on the Dashboard, affecting confidentiality and integrity without a reported service interruption.

The record

CVE
CVE-2023-23640
Published
Jun 9, 2024
Updated
Apr 28, 2026
Vendor
MainWP
Product
MainWP UpdraftPlus Extension
Classifications
CWE-862
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 9, 2024CVE 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

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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=0 <=4.0.6
  2. Affected versionversion=n/a <=4.0.6 changes=[{"at":"4.0.7","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

MainWP · MainWP UpdraftPlus Extensionversion=0 <=4.0.6; version=n/a <=4.0.6 changes=[{"at":"4.0.7","status":"unaffected"}]

Published CVSS scores

5.4PatchstackCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
8.8OSVCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization

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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