# CVE-2026-6810: Missing authorization in Booking Calendar Contact Form

> Authenticated subscribers can take over other users' calendars and view associated data due to missing validation in the Booking Calendar Contact Form plugin.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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:** 24 Apr 2026
- **Updated:** 24 Apr 2026
- **Also known as:** GHSA-qfjv-r2q6-x287

## What is CVE-2026-6810?

CVE-2026-6810 is a medium-severity missing authorization vulnerability in codepeople Booking Calendar Contact Form, published on 24 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Booking Calendar Contact Form plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.2.63 via the dex_bccf_admin_int_calendar_list.inc.php file due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with Subscriber-level access and above, to takeover other user's calendars and view user data associated with the calendar.

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

## Which versions are affected by CVE-2026-6810?


## How do I fix CVE-2026-6810?

No fix has been published for CVE-2026-6810 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-6810 being exploited?

There is no known exploitation of CVE-2026-6810 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-6810 and fix it if it is affected.

What it is: CVE-2026-6810 is a medium-severity missing authorization vulnerability in codepeople Booking Calendar Contact Form, published on 24 Apr 2026. 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-2026-6810 in the wild and no public exploit code.

Affected product: codepeople Booking Calendar Contact Form. 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-2026-6810/ (Markdown: https://insights.sbomify.com/CVE-2026-6810/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-6810
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6810
- OSV: https://osv.dev/vulnerability/CVE-2026-6810

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-6810/
Summaries are generated and may contain mistakes; the official description above is the record.