CVE-2023-2159Network attack vector

Unauthenticated site access via predictable bypass token

Published Jun 9, 2023 · Updated Apr 8, 2026

Improper access control in NiteoThemes CMP – Coming Soon & Maintenance 4.1.7 and earlier allows remote attackers to view a hidden site. The maintenance-mode request path accepts a cmp_bypass GET token equal to the MD5 hash of the site's home URL, making the default bypass value predictable. No account or user interaction is required; exploitation exposes content that the maintenance page was intended to conceal without changing it.

CVSS severity5.3
Medium
EPSS probability0.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in NiteoThemes CMP – Coming Soon & Maintenance 4.1.7 and earlier allows remote attackers to view a hidden site. The maintenance-mode request path accepts a cmp_bypass GET token equal to the MD5 hash of the site's home URL, making the default bypass value predictable. No account or user interaction is required; exploitation exposes content that the maintenance page was intended to conceal without changing it.

The record

CVE
CVE-2023-2159
Published
Jun 9, 2023
Updated
Apr 8, 2026
Vendor
NiteoThemes
Product
CMP – Coming Soon & Maintenance Plugin
Classifications
CWE-284
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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 <=4.1.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NiteoThemes · CMP – Coming Soon & Maintenance Pluginversion=0 <=4.1.7

Published CVSS scores

5.3WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control

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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