# CVE-2024-5674: Newsletter - API v1 and v2 addon for Newsletter <= 2.4.5 - Missing Authorization to Email Subscribers Management

> Unauthenticated attackers can list, create, or delete newsletter subscribers due to a PHP type juggling flaw in the API addon.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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:** 12 Jun 2024
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-8xmg-v9fm-xcgv

## What is CVE-2024-5674?

CVE-2024-5674 is a medium-severity missing authorization vulnerability in The Newsletter Team Newsletter - API v1 and v2 addon for Newsletter, published on 12 Jun 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Newsletter - API v1 and v2 addon plugin for WordPress is vulnerable to unauthorized subscribers management due to PHP type juggling issue on the check_api_key function in all versions up to, and including, 2.4.5. This makes it possible for unauthenticated attackers to list, create or delete newsletter subscribers. This issue affects only sites running the PHP version below 8.0

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2024-5674?

It affects 1 product.


Products: Newsletter Newsletter.

## How do I fix CVE-2024-5674?

No fix has been published for CVE-2024-5674 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-5674 being exploited?

There is no known exploitation of CVE-2024-5674 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-5674 and fix it if it is affected.

What it is: CVE-2024-5674 is a medium-severity missing authorization vulnerability in The Newsletter Team Newsletter - API v1 and v2 addon for Newsletter, published on 12 Jun 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-2024-5674 in the wild and no public exploit code.

Affected product: The Newsletter Team Newsletter - API v1 and v2 addon for Newsletter. 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-2024-5674/ (Markdown: https://insights.sbomify.com/CVE-2024-5674/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-5674
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-5674
- OSV: https://osv.dev/vulnerability/CVE-2024-5674

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-5674/
Summaries are generated and may contain mistakes; the official description above is the record.