# CVE-2021-24712: Appointment Hour Booking – WordPress Booking Plugin < 1.3.17 - Authenticated Stored XSS

> Authenticated attackers can inject malicious scripts via calendar creation fields, potentially compromising user sessions in the Appointment Hour Booking plugin.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 11 Oct 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-4fc4-4rqx-5r93

## What is CVE-2021-24712?

CVE-2021-24712 is a medium-severity cross-site scripting vulnerability in Unknown Appointment Hour Booking – WordPress Booking Plugin, published on 11 Oct 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

The Appointment Hour Booking WordPress plugin before 1.3.17 does not properly sanitize values used when creating new calendars.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2021-24712?

It affects 1 product.


Products: Dwbooster Appointment Hour Booking.

## How do I fix CVE-2021-24712?

No fix has been published for CVE-2021-24712 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24712 being exploited?

There is no known exploitation of CVE-2021-24712 in the wild and no public exploit code.

## Other vulnerabilities in Unknown Appointment Hour Booking – WordPress Booking Plugin

- [CVE-2022-4035](https://insights.sbomify.com/CVE-2022-4035/): Appointment Hour Booking <= 1.3.72 - Unauthenticated iFrame Injection via Appointment Form (high 7.2)
- [CVE-2019-13505](https://insights.sbomify.com/CVE-2019-13505/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2022-4034](https://insights.sbomify.com/CVE-2022-4034/): Appointment Hour Booking <= 1.3.72 - CSV Injection (medium 5.8)
- [CVE-2022-4036](https://insights.sbomify.com/CVE-2022-4036/): Appointment Hour Booking <= 1.3.72 - CAPTCHA Bypass (medium 5.3)
- [CVE-2022-1710](https://insights.sbomify.com/CVE-2022-1710/): Appointment Hour Booking < 1.3.56 - Admin+ Stored Cross-Site Scripting (medium 4.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-24712 and fix it if it is affected.

What it is: CVE-2021-24712 is a medium-severity cross-site scripting vulnerability in Unknown Appointment Hour Booking – WordPress Booking Plugin, published on 11 Oct 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-24712 in the wild and no public exploit code.

Affected product: Unknown Appointment Hour Booking – WordPress Booking Plugin. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-24712/ (Markdown: https://insights.sbomify.com/CVE-2021-24712/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24712
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24712
- OSV: https://osv.dev/vulnerability/CVE-2021-24712

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-24712/
Summaries are generated and may contain mistakes; the official description above is the record.