# CVE-2023-2834: BookIt <= 2.3.7 - Authentication Bypass

> Unauthenticated attackers can bypass authentication and log in as any existing user, including administrators, by exploiting insufficient verification during appointment booking.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 Jun 2023
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-x48c-rrg8-735f

## What is CVE-2023-2834?

CVE-2023-2834 is a critical authentication bypass vulnerability in stellarwp Bookit — Booking & Appointment Calendar, published on 30 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The BookIt plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 2.3.7. This is due to insufficient verification on the user being supplied during booking an appointment through the plugin. This makes it possible for unauthenticated attackers to log in as any existing user on the site, such as an administrator, if they have access to the email.

Weakness: CWE-306 (Missing Authentication for Critical Functionality), CWE-288 (Authentication Bypass Using an Alternate Path or Channel)

## Which versions are affected by CVE-2023-2834?

It affects 1 product.


Products: Stylemixthemes Bookit.

## How do I fix CVE-2023-2834?

No fix has been published for CVE-2023-2834 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-2834 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-2834 exists.

## Other vulnerabilities in stellarwp Bookit — Booking & Appointment Calendar

- [CVE-2023-50852](https://insights.sbomify.com/CVE-2023-50852/): WordPress BookIt Plugin <= 2.4.3 is vulnerable to SQL Injection (high 7.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-2834 and fix it if it is affected.

What it is: CVE-2023-2834 is a critical authentication bypass vulnerability in stellarwp Bookit — Booking & Appointment Calendar, published on 30 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-2834 exists.

Affected product: stellarwp Bookit — Booking & Appointment Calendar. 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-2023-2834/ (Markdown: https://insights.sbomify.com/CVE-2023-2834/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-2834
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-2834
- OSV: https://osv.dev/vulnerability/CVE-2023-2834

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-2834/
Summaries are generated and may contain mistakes; the official description above is the record.