What is CVE-2024-5674?

CVE-2024-5674 is a medium-severity vulnerability in Newsletter, classified under Missing Authorization. CVSS score: 6.5/10. Published 2024-06-12.

How severe is CVE-2024-5674?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Newsletter

CVE-2024-5674

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

Vulnerability class: Broken Access Control

Published 2024-06-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (22.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Newsletter
The Newsletter Team - API V1 And V2 Addon For — versions 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

www.wordfence.com/threat-intel/vulnerabilities/id/ecd9800e-ce0f-45f3-bb66-3690c… (Third Party Advisory)
www.thenewsletterplugin.com/documentation/developers/newsletter-api-2/ (Product)

Frequently asked questions

What is CVE-2024-5674?: CVE-2024-5674 is a medium-severity vulnerability in Newsletter, classified under Missing Authorization. CVSS score: 6.5/10. Published 2024-06-12.
How severe is CVE-2024-5674?: Medium severity. CVSS v3 base score is 6.5 out of 10.