# CVE-2026-18441: Information disclosure in Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress

> Unauthenticated attackers can disclose customer PII by enumerating IDs when guest checkout is enabled in the LatePoint WordPress plugin.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Sep 2026
- **Updated:** 19 Sep 2026
- **Also known as:** GHSA-54gg-9j3p-7mx3

## What is CVE-2026-18441?

CVE-2026-18441 is a medium-severity vulnerability in Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress, published on 17 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 5.6.9  via the set_customer_object due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to enumerate arbitrary customer records and disclose personally identifiable information -  including first name, last name, email address, and phone number - by iterating the customer[id] parameter. This issue is exploitable only when the site is configured with customer authentication disabled (guest checkout enabled).

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2026-18441?


## How do I fix CVE-2026-18441?

No fix has been published for CVE-2026-18441 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-18441 being exploited?

There is no known exploitation of CVE-2026-18441 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-18441 and fix it if it is affected.

What it is: CVE-2026-18441 is a medium-severity vulnerability in Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress, published on 17 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-18441 in the wild and no public exploit code.

Affected product: Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress. 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-2026-18441/ (Markdown: https://insights.sbomify.com/CVE-2026-18441/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-18441
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-18441
- OSV: https://osv.dev/vulnerability/CVE-2026-18441

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-18441/
Summaries are generated and may contain mistakes; the official description above is the record.