# CVE-2025-13754: Missing authorization in Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin

> Unauthenticated attackers can access an admin endpoint to extract private business configuration and potentially API keys from the Simply Schedule Appointments plugin.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Dec 2025
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-wjwr-77x9-rqfh

## What is CVE-2025-13754?

CVE-2025-13754 is a medium-severity missing authorization vulnerability in croixhaug Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin, published on 19 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.6.9.16. This is due to the plugin exposing its admin embed endpoint at `/wp-json/ssa/v1/embed-inner-admin` without authentication, which leaks plugin settings including staff names, business names, and configuration data that are not publicly displayed on the booking form. This makes it possible for unauthenticated attackers to extract private business configuration. In premium versions with integrations configured, this might also expose other sensitive data including API keys for external services.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2025-13754?


## How do I fix CVE-2025-13754?

No fix has been published for CVE-2025-13754 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-13754 being exploited?

There is no known exploitation of CVE-2025-13754 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-13754 and fix it if it is affected.

What it is: CVE-2025-13754 is a medium-severity missing authorization vulnerability in croixhaug Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin, published on 19 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-13754 in the wild and no public exploit code.

Affected product: croixhaug Appointment Booking Calendar — Simply Schedule Appointments 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-2025-13754/ (Markdown: https://insights.sbomify.com/CVE-2025-13754/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-13754
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-13754
- OSV: https://osv.dev/vulnerability/CVE-2025-13754

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-13754/
Summaries are generated and may contain mistakes; the official description above is the record.