CVE-2023-2159: The CMP – Coming Soon & Maintenance plugin for WordPress is vulnerable to Maintenance Mode Bypass in versions

Q: How do I fix CVE-2023-2159?

cmp: upgrade to 4.1.8. Exact commands for each OS are on this page.

Q: Is CVE-2023-2159 being exploited?

CVE-2023-2159 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-2159 affect?

CVE-2023-2159 affects cmp. Severity is medium (CVSS 5.3). The CMP – Coming Soon & Maintenance plugin for WordPress is vulnerable to Maintenance Mode Bypass in versions up to, and including, 4.1.7. A correct cmp_bypass GET parameter in the URL (equal to the md5-hashed home_url in the default settin

Q: How urgent is CVE-2023-2159?

Priority 42/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 5.3REMOTEUPGRADE

CVE-2023-2159 is a medium-severity flaw (CVSS 5.3) affecting cmp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The CMP – Coming Soon & Maintenance plugin for WordPress is vulnerable to Maintenance Mode Bypass in versions up to, and including, 4.1.7. A correct cmp_bypass GET parameter in the URL (equal to the md5-hashed home_url in the default setting) allows users to visit a site placed in maintenance mode thus bypassing the plugin's provided feature.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-284
Published	2023-06-09
Last modified	2026-06-17

Publisher (CNA): Wordfence · Vendor: niteothemes

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-06-09 06:16 UTCPublished CVE record published
2026-06-17 05:51 UTCUpdated Record last modified

niteothemes cmp UPGRADE

Affected: < 4.1.8

Fixed in: 4.1.8

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cmp || rpm -q cmp || cmp --version

2. UPGRADE to 4.1.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cmp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cmp

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-2159?

cmp: upgrade to 4.1.8. Exact commands for each OS are on this page.

Is CVE-2023-2159 being exploited?

CVE-2023-2159 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-2159 affect?

CVE-2023-2159 affects cmp. Severity is medium (CVSS 5.3). The CMP – Coming Soon & Maintenance plugin for WordPress is vulnerable to Maintenance Mode Bypass in versions up to, and including, 4.1.7. A correct cmp_bypass GET parameter in the URL (equal to the md5-hashed home_url in the default settin

How urgent is CVE-2023-2159?

Priority 42/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

WordPress vulnerabilities

Related CVEs

CVE-2020-36730 HIGH 8.3 UPGRADE The CMP for WordPress is vulnerable to authorization bypass due to a missing capability check on the cmp_get_p

References

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