TI-2026-78588 Aliases CVE-2026-101138 GHSA-8phv-5wjj-2pv3

CMP Coming Soon & Maintenance Mode Bypass via Custom URL Whitelist

LOW 30CWE-284Published 2026-10-21 · Updated 2026-10-21

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: Low · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-284.

Summary

The CMP Coming Soon & Maintenance WordPress plugin, versions 4.1.19 before 4.1.21, does not apply maintenance mode to pages added to its page whitelist by manually entered URL pattern. Unauthenticated visitors can view the content of those pages while maintenance mode is active. The weakness is classified as CWE-284 (Improper Access Control) and has a CVSS 3.1 base score of 5.3 (Medium).

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

The CMP – Coming Soon & Maintenance WordPress plugin before 4.1.21 does not correctly apply maintenance mode to pages added to its page whitelist by manually entered URL pattern, allowing unauthenticated visitors to view the content of those pages while maintenance mode is active.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00256 17th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix Fixed CMP – Coming Soon & Maintenance (Unknown): 4.1.21

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Unknown	CMP – Coming Soon & Maintenance	4.1.19 to before 4.1.21	4.1.21	Patch available	CNA

CMP – Coming Soon & Maintenance VendorUnknown Affected 4.1.19 to before 4.1.21 Fixed in 4.1.21 Patch available CNA

Remediation

Update the CMP Coming Soon & Maintenance plugin to version 4.1.21, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Fix · CNA CMP – Coming Soon & Maintenance (Unknown) Fixed in 4.1.21

Timeline

2026-10-21 Threatist record created from CVE-2026-101138
2026-10-21 Alias added: GHSA-8phv-5wjj-2pv3

References

Exploit 1

https://wpscan.com/vulnerability/ae9f4fa9-e17d-4c52-86c8-48e5ba0dfef8/

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences