Newsletters <= 4.13 - Unauthenticated SQL Injection via wpmlsubscriber_id Parameter

7.5
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CVE CVE-2026-3018
CVSS 7.5 (High)
Publicly Published June 9, 2026
Last Updated June 10, 2026
Researcher wesley (wcraft)

Description

The Newsletters plugin for WordPress is vulnerable to time-based SQL Injection via the ‘wpmlsubscriber_id’ parameter in all versions up to, and including, 4.13 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

Learn more about SQL Injection vulnerabilities and how to prevent them.

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Vulnerability Details for Newsletters

Software Type Plugin
Software Slug newsletters-lite (view on wordpress.org)
Patched? Yes
Remediation Update to version 4.14, or a newer patched version
Affected Version
  • <= 4.13
Patched Version
  • 4.14

Recent vulnerabilities in Newsletters

# Title CVE ID CVSS Researchers Date
1 Newsletters <= 4.13 - Missing Authorization CVE-2026-57645 4.3 Prodigysec June 26, 2026
2 Newsletters <= 4.13 - Missing Authorization CVE-2026-54840 5.3 HieuPenguinnn June 18, 2026
3 Newsletters <= 4.11 - Unauthenticated PHP Object Injection CVE-2025-67911 8.1 Skalucy December 31, 2025
4 Newsletters <= 4.12 - Authenticated (Contributor+) Stored Cross-Site Scripting CVE-2025-69020 6.4 Muhammad Yudha - DJ December 28, 2025
5 Newsletters <= 4.10 - Unauthenticated Local File Inclusion CVE-2025-54034 8.1 Nguyen Xuan Chien July 29, 2025
6 Newsletters <= 4.10 - Cross-Site Request Forgery CVE-2025-54035 4.3 Nguyen Xuan Chien July 16, 2025
7 Newsletters <= 4.9.9.9 - Authenticated (Administrator+) Local File Inclusion CVE-2025-4857 7.2 m3ssap0 May 30, 2025
8 Newsletters <= 4.9.9.8 - Authenticated (Contributor+) SQL Injection orderby Parameter CVE-2025-3107 6.5 Peter Thaleikis May 12, 2025
9 Newsletters <= 4.9.9.7 - Authenticated (Administrator+) SQL Injection CVE-2025-30921 4.9 Webula March 27, 2025
10 Newsletters <= 4.9.9.7 - Unauthenticated Stored Cross-Site Scripting CVE-2025-2009 7.2 m3ssap0 March 25, 2025

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