# CVE-2023-6557: The Events Calendar <= 6.2.8.2 - Unauthenticated Sensitive Information Exposure

> Unauthenticated attackers can extract sensitive post titles and IDs from pending, private, and draft posts via an exposed AJAX route.

- **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:** 5 Feb 2024
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-p884-m725-55w6

## What is CVE-2023-6557?

CVE-2023-6557 is a medium-severity vulnerability in stellarwp The Events Calendar, published on 5 Feb 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The The Events Calendar plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 6.2.8.2 via the route function hooked into wp_ajax_nopriv_tribe_dropdown. This makes it possible for unauthenticated attackers to extract potentially sensitive data including post titles and IDs of pending, private and draft posts.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2023-6557?

It affects 1 product.


Products: Stellarwp the Events Calendar.

## How do I fix CVE-2023-6557?

No fix has been published for CVE-2023-6557 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-6557 being exploited?

There is no known exploitation of CVE-2023-6557 in the wild and no public exploit code.

## Other vulnerabilities in stellarwp The Events Calendar

- [CVE-2024-8275](https://insights.sbomify.com/CVE-2024-8275/): The Events Calendar <= 6.6.4 - Unauthenticated SQL Injection (critical 9.8)
- [CVE-2024-4180](https://insights.sbomify.com/CVE-2024-4180/): The Events Calendar < 6.4.0.1 - Reflected XSS (critical 9.1)
- [CVE-2023-6203](https://insights.sbomify.com/CVE-2023-6203/): The Events Calendar < 6.2.8.1 - Unauthenticated Arbitrary Password Protected Post Read (high 7.5)
- [CVE-2024-6931](https://insights.sbomify.com/CVE-2024-6931/): The Events Calendar <= 6.6.3 - Unauthenticated Stored Cross-Site Scripting (high 7.2)
- [CVE-2025-5144](https://insights.sbomify.com/CVE-2025-5144/): The Events Calendar <= 6.13.2 - Authenticated (Contributor+) DOM-Based Stored Cross-Site Scripting (medium 6.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-6557 and fix it if it is affected.

What it is: CVE-2023-6557 is a medium-severity vulnerability in stellarwp The Events Calendar, published on 5 Feb 2024. 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-2023-6557 in the wild and no public exploit code.

Affected product: stellarwp The Events 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-2023-6557/ (Markdown: https://insights.sbomify.com/CVE-2023-6557/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-6557
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-6557
- OSV: https://osv.dev/vulnerability/CVE-2023-6557

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-6557/
Summaries are generated and may contain mistakes; the official description above is the record.